Artificial intelligence expert Peter Norvig is joining the Stanford Institute for Human-Centered AI this fall as a Distinguished Education Fellow, with the task of developing tools and materials to explain the key concepts of artificial intelligence. From a blog post: Norvig helped launch and build AI at organizations considered innovators in the field: As Google's director of research, he oversaw the tech giant's search algorithms and built the teams that focused on machine translation, speech recognition, and computer vision. At NASA Ames, his team created autonomous software that was the first to command a spacecraft, and served as a precursor to the current Mars rovers. Norvig is also a well-known name in AI education. He co-wrote Artificial Intelligence: A Modern Approach, an introductory textbook used by some 1,500 universities worldwide, and he's taught hundreds of thousands of students through his courses on online education platform Udacity. In this interview, he discusses his move to Stanford, building a human-focused AI curriculum, and broadening access to education. When asked why he's leaving Google, Norvig said: "Throughout my career I've gone back and forth between the major top-level domains: .edu, .com, and .gov. After 20 years with one company and after 18 months stuck working from home, I thought it was a good time to try something new, and to concentrate on education."

Engineers at the University of Cincinnati are developing new ways to convert greenhouse gases to fuel to address climate change and get astronauts home from Mars. UC: UC College of Engineering and Applied Science assistant professor Jingjie Wu and his students used a carbon catalyst in a reactor to convert carbon dioxide into methane. Known as the "Sabatier reaction" from the late French chemist Paul Sabatier, it's a process the International Space Station uses to scrub the carbon dioxide from air the astronauts breathe and generate rocket fuel to keep the station in high orbit. But Wu is thinking much bigger.

The Martian atmosphere is composed almost entirely of carbon dioxide. Astronauts could save half the fuel they need for a return trip home by making what they need on the red planet once they arrive, Wu said. "It's like a gas station on Mars. You could easily pump carbon dioxide through this reactor and produce methane for a rocket," Wu said. UC's study was published in the journal Nature Communications with collaborators from Rice University, Shanghai University and East China University of Science and Technology. Wu began his career in chemical engineering by studying fuel cells for electric vehicles but began looking at carbon dioxide conversion in his chemical engineering lab about 10 years ago.

"I realized that greenhouse gases were going to be a big issue in society," Wu said. "A lot of countries realized that carbon dioxide is a big issue for the sustainable development of our society. That's why I think we need to achieve carbon neutrality." The Biden Administration has set a goal of achieving a 50% reduction in greenhouse gas pollutants by 2030 and an economy that relies on renewable energy by 2050. "That means we'll have to recycle carbon dioxide," Wu said. Wu and his students, including lead author and UC doctoral candidate Tianyu Zhang, are experimenting with different catalysts such as graphene quantum dots -- layers of carbon just nanometers big -- that can increase the yield of methane.

Scientists found evidence that a region of northern Mars called Arabia Terra experienced thousands of "super eruptions," the biggest volcanic eruptions known, over a 500-million-year period. NASA reports the findings in a post: Some volcanoes can produce eruptions so powerful they release oceans of dust and toxic gases into the air, blocking out sunlight and changing a planet's climate for decades. By studying the topography and mineral composition of a portion of the Arabia Terra region in northern Mars, scientists recently found evidence for thousands of such eruptions, or "super eruptions," which are the most violent volcanic explosions known. Spewing water vapor, carbon dioxide, and sulfur dioxide into the air, these explosions tore through the Martian surface over a 500-million-year period about 4 billion years ago. Scientists reported this estimate in a paper published in the journal Geophysical Research Letters in July 2021. "Each one of these eruptions would have had a significant climate impact -- maybe the released gas made the atmosphere thicker or blocked the Sun and made the atmosphere colder," said Patrick Whelley, a geologist at NASA's Goddard Space Flight Center in Greenbelt, Maryland, who led the Arabia Terra analysis. "Modelers of the Martian climate will have some work to do to try to understand the impact of the volcanoes."
[...]
One remaining question is how a planet can have only one type of volcano littering a region. On Earth volcanoes capable of super eruptions -- the most recent erupted 76,000 years ago in Sumatra, Indonesia -- are dispersed around the globe and exist in the same areas as other volcano types. Mars, too, has many other types of volcanoes, including the biggest volcano in the solar system called Olympus Mons. Olympus Mons is 100 times larger by volume than Earth's largest volcano of Mauna Loa in Hawaii, and is known as a "shield volcano," which drains lava down a gently sloping mountain. Arabia Terra so far has the only evidence of explosive volcanoes on Mars. It's possible that super-eruptive volcanoes were concentrated in regions on Earth but have been eroded physically and chemically or moved around the globe as continents shifted due to plate tectonics. These types of explosive volcanoes also could exist in regions of Jupiter's moon Io or could have been clustered on Venus. Whatever the case may be, Richardson hopes Arabia Terra will teach scientists something new about geological processes that help shape planets and moons.

NASA's Mars rover Perseverance collected its second rock sample this week — and Friday Caltech's Ken Farley, a project scientist for the mission, announced that they've learned something.

"It's a big deal that the water was there a long time." The Perseverance science team already knew a lake once filled the crater; for how long has been more uncertain. The scientists couldn't dismiss the possibility that Jezero's lake was a "flash in the pan": floodwaters could have rapidly filled the impact crater and dried up in the space of 50 years, for example. But the level of alteration that scientists see in the rock that provided the core samples — as well as in the rock the team targeted on their first sample-acquisition attempt — suggests that groundwater was present for a long time.

This groundwater could have been related to the lake that was once in Jezero, or it could have traveled through the rocks long after the lake had dried up. Though scientists still can't say whether any of the water that altered these rocks was present for tens of thousands or for millions of years, they feel more certain that it was there for long enough to make the area more welcoming to microscopic life in the past.
And they discovered something interesting in the rock samples: salts. These salts may have formed when groundwater flowed through and altered the original minerals in the rock, or more likely when liquid water evaporated, leaving the salts. The salt minerals in these first two rock cores may also have trapped tiny bubbles of ancient Martian water. If present, they could serve as microscopic time capsules, offering clues about the ancient climate and habitability of Mars.

Salt minerals are also well-known on Earth for their ability to preserve signs of ancient life.

An anonymous reader quotes a report from CNN: The Perseverance rover successfully drilled into a Martian rock on Thursday, creating an intact core sample that could one day be returned to Earth. But NASA wants better images to make sure the sample is safely in the tube before it's sealed up and stowed on the rover. So far, data sent back by the rover and initial images suggest an intact sample was inside the tube after Perseverance drilled into a rock selected by the mission's science team. After the initial images were taken, the rover vibrated the drill bit and tube for five one-second bursts to clear both of any residual material from outside of the tube. It's possible that this caused the sample to slide down further inside the tube.

The next images taken after this were "inconclusive due to poor sunlight conditions," according to the agency. Perseverance will use its cameras to take more images under better lighting conditions before conducting the next steps of the sampling process. The extra step of taking additional images before sealing and stowing the sample tube was added after Perseverance attempted to drill into another rock target on August 5. During that attempt, the rock crumbled and there was no sample present in the tube once it was stowed.

Perseverance is currently exploring the Citadelle location in Jezero Crater, which -- billions of years ago -- was once the site of an ancient lake. The rover's specific target was a rock called Rochette, which is about the size of a briefcase and is part of a half-mile ridgeline of rock outcrops and boulders. The mission team should receive more images of what's inside the sample tube by September 4. If images taken while the sun is at a better angle don't help the team determine whether a sample is present, the tube will be sealed and the rover will measure its volume. If Perseverance is able to successfully collect samples from Mars, they will be returned to Earth by future missions -- and they could reveal if microbial life ever existed on Mars.

The asteroid credited with the extinction of the dinosaurs 66 million years ago is likely to have originated from the outer half of the solar system's main asteroid belt, according to new research by Southwest Research Institute (SwRI). Space.com reports: Known as the Chicxulub impactor, this large object has an estimated width of 6 miles (9.6 kilometers) and produced a crater in Mexico's Yucatan peninsula that spans 90 miles (145 kilometers). After its sudden contact with Earth, the asteroid wiped out not only the dinosaurs, but around 75 percent of the planet's animal species. It is widely accepted that this explosive force created was responsible for the mass extinction that ended the Mesozoic era. Researchers used computer models to analyse how asteroids are pulled from their orbit in different areas of the asteroid belt and drawn towards planets. The observations of 130,000 model asteroids, along with data and behaviour seen in other known impactors, found that objects are 10 times more likely to reach Earth from the outer asteroid belt than previously thought.

Prior to crashing into Earth, the extinction-causing asteroid orbited the sun with others, in the main asteroid belt. This concentrated band lies between planets Mars and Jupiter, with its contents usually kept in place by the forces of gravity. Before this study was released, scientists thought that very few of Earth's impactors escaped from the belt's outer half. But, researchers at SwRI discovered that "escape hatches" could be created by thermal forces, which pull more distant asteroids out of orbit and in the direction of Earth. The objects found in these outermost parts of the asteroid belt include many carbonaceous chondrite impactors. These are dark, porous and carbon-containing rocks which can also be found on Earth. Leading up to this research, other scientists have attempted to learn more about the object that doomed the dinosaurs. This included examinations of 66-million-year-old rocks. By doing this, geologists discovered that the Chicxulub asteroid had a similar composition to today's carbonaceous chondrites. By looking at wide timescales of the Chicxulub asteroid, the scientists could predict that a 6-mile asteroid is likely to come into contact with Earth once every 250 million years. Their model showed almost 50 percent of these significant impactors to be of the same carbonaceous chondrite composition. Details of the new study will be published in the November 2021 issue of the journal Icarus.

Friday the Perseverance rover on Mars made its first attempt to collect a rock sample and seal it in a tube, reports NASA. But unfortunately, the data "indicate that no rock was collected during the initial sampling activity..."

"The sampling process is autonomous from beginning to end," said Jessica Samuels, the surface mission manager for Perseverance at NASA's Jet Propulsion Laboratory in Southern California. "One of the steps that occurs after placing a probe into the collection tube is to measure the volume of the sample. The probe did not encounter the expected resistance that would be there if a sample were inside the tube."

The Perseverance mission is assembling a response team to analyze the data. One early step will be to use the WATSON (Wide Angle Topographic Sensor for Operations and eNgineering) imager - located at the end of the robotic arm - to take close-up pictures of the borehole. Once the team has a better understanding of what happened, it will be able to ascertain when to schedule the next sample collection attempt. "The initial thinking is that the empty tube is more likely a result of the rock target not reacting the way we expected during coring, and less likely a hardware issue with the Sampling and Caching System," said Jennifer Trosper, project manager for Perseverance at JPL
"Mars keeps surprising us," adds the rover's Twitter feed. "We're working through this new challenge. More to come."

Space.com points out this wasn't a make-or-break moment for the rover, since it's still carrying 42 more sampling tubes. And the plan has always been to leave the sample tubes on the surface of Mars, where they'll be retrieved later by future Mars missions.

Elon Musk's SpaceX stacked a Starship prototype rocket on top of a Super Heavy rocket booster for the first time on Friday morning, giving a look at the scale of the combined nearly 400-foot-tall vehicle. From a report: Musk, asked by CNBC what he thought of witnessing the milestone at the company's facility in Boca Chica, Texas, responded simply. "Dream come true," Musk replied in a tweet.

SpaceX is developing Starship to launch cargo and people on missions to the moon and Mars. Starship prototypes stand at about 160 feet tall, or around the size of a 16-story building, and are built of stainless steel -- representing the early version of the rocket that Musk unveiled in 2019. The rocket lifts off on top of a Super Heavy booster, which makes up the bottom half of the rocket and stands about 230 feet tall. Together, Starship and Super Heavy are nearly 400 feet tall when stacked for launch.

Slashdot reader fahrbot-bot quotes the New York Times: Two red things are hiding in a part of the solar system where they shouldn't be. The space rocks may have come from beyond Neptune, and potentially offer hints at the chaos of the early solar system.

Scientists led by Sunao Hasegawa from JAXA, the Japanese space agency, reported in The Astrophysical Journal Letters on July 26, 2021 that two objects, called 203 Pompeja and 269 Justitia, spotted in the asteroid belt between Mars and Jupiter appear to have originated beyond Neptune. The discoveries could one day provide direct evidence of the chaos that existed in the early solar system.

"If true it would be a huge deal," says Hal Levison, a planetary scientist at the Southwest Research Institute in Colorado, who was not involved in the research...

"People have been talking about some fraction of asteroids coming from the Kuiper belt for quite a while now," said Josh Emery, a planetary scientist from Northern Arizona University who was not involved in the paper. He said the research "definitely takes a step" toward finding evidence to support that hypothesis. Not everyone is convinced just yet. Dr. Levison, who was also not involved in the paper, says objects should become less red as they approach the sun. "It seems to be inconsistent with our models," said Dr. Levison, who is the head of NASA's Lucy mission, which is scheduled to launch in October to study Jupiter's Trojans [asteroids captured in its orbit].

Michaël Marsset from the Massachusetts Institute of Technology, a co-author on the paper, agrees that it's not clear why they would be so red, but it is possibly related to how long it took them to become implanted into the asteroid belt. Some Trojans may also be as red, but haven't been found yet.

To truly confirm the origin of 203 Pompeja and 269 Justitia, a spacecraft would likely need to visit them.

"A quake-measuring device on Mars is providing the first detailed look at the red planet's interior, revealing a surprisingly thin crust and a hot molten core beneath the frigid surface," reports the Associated Press: In a series of articles published this week, scientists reported that the Martian crust is within the thickness range of Earth's. The Martian mantle between the crust and core is roughly half as thick as Earth's. And the Martian core is on the high side of what scientists anticipated, although smaller than the core of our own nearly twice-as-big planet.

These new studies confirm that the Martian core is molten. But more research is needed to know whether Mars has a solid inner core like Earth's, surrounded by a molten outer core, according to the international research teams. Stronger marsquakes could help identify any multiple core layers, scientists said Friday. The findings are based on about 35 marsquakes registered by a French seismometer on NASA's InSight stationary lander, which arrived at Mars in 2018...

InSight has been hit with a power crunch in recent months. Dust covered its solar panels, just as Mars was approaching the farthest point in its orbit around the sun. Flight controllers have boosted power by using the lander's robot arm to release sand into the blowing wind to knock off some of the dust on the panels. The seismometer has continued working, but all other science instruments remain on hiatus because of the power situation — except for a German heat probe was declared dead in January after it failed to burrow more than a couple feet (half a meter) into the planet.

The three studies and a companion article appeared in Thursday's edition of the journal Science.

Comic-Con went virtual again in 2020. (San Diego businesses will miss the chance to profit from the 100,000 visitors the convention usually attracted.) And NPR reports the convention has gotten smaller in other ways: Both Marvel Studios and DC are staying away; as it did last year, DC is again directing its resources towards its own event, DC FanDome, set for mid-October. But fans of shows like Doctor Who, Dexter and Comic-Con stalwart The Walking Dead will have lots to look forward to.
Rotten Tomatoes and The Verge have gathered up the trailers that did premier. Some of the highlights:

• Blade Runner: Black Lotus , an upcoming anime television series set to premiere in late 2021 on Crunchyroll and Adult Swim (co-producing it with Alcon Television Group).
• The upcoming remake of Dune
• J.J. Abrams' new four-part Showtime documentary about UFOs.
• Season 2 of Star Trek: Lower Decks and the new Star Trek: Prodigy, a CGI-animated series about a group of aliens who escape captivity onboard the Enterprise.

But interestingly, one of the more visibile presenters was: NASA. Current and former NASA officials made appearances on several different panels, according to Space.com, including one on modern space law, U.N. treaty-making, and how it all stacks up against the portrayal we get in our various future-space franchises. And a former NASA astronaut was also part of a panel touting a virtual simulation platform, "where students can have access to the same tools that professionals use and in the case of space are given the opportunity to solve real problems related to missions to our Moon, Mars, and beyond... from piloting to terra-forming to creating habitats and spacecraft."

There was also a panel of four NASA engineers titled "No Tow Trucks Beyond Mars," on "how we go boldly where there's no one around to fix it. Hear stories from the trenches of the heartbreaks, close calls, and adventures of real-life landing (and flying!) on Mars and our round-table discussion of what Netflix got right in their movie Stowaway."

Sunday's panels will include an astronomer, an astrobiologist, and a geologist/paleontologist discussing "The Science of Star Wars" with the concept designer for Star Wars episodes 7-9, Rogue One, and Solo.

NASA announced on Monday that Ingenuity's ninth flight was a success, as it undertook a "high-speed flight across unfriendly terrain." The Hill reports: Ingenuity flew for 166.4 seconds at a pace of 5 meters per second over a terrain of high slopes -- all new records for the helicopter. In preparation for the flight, NASA said, "First, we believe Ingenuity is ready for the challenge, based on the resilience and robustness demonstrated in our flights so far. Second, this high-risk, high-reward attempt fits perfectly within the goals of our current operational demonstration phase. A successful flight would be a powerful demonstration of the capability that an aerial vehicle (and only an aerial vehicle) can bring to bear in the context of Mars exploration -- traveling quickly across otherwise untraversable terrain while scouting for interesting science targets."

India's CNN-News18 reports: [P]revious research has found that how cells pick a particular repair strategy can be influenced by the microgravity conditions in space. Scientists are concerned that DNA repairs influenced by microgravity conditions may not be adequate, and can lead to harmful consequences. To study the DNA repair process in space, scientists have developed a new technique that uses CRISPR/Cas9 — a gene-editing technology — to recreate precise damages so that cells can be observed repairing them. The team of researchers led by Sarah Stahl-Rommel has successfully demonstrated the technique and its viability aboard the International Space Station.
"CRISPR gene editing is no longer confined to Earth," reports Engadget: The new approach clears the way for other research around DNA repair in space. With enough work, the scientists hope they can replicate the genetic damage from ionizing radiation, not to mention other effects from long-term spaceflight. That, in turn, could help NASA and other agencies develop technology that shields astronauts and makes deep space exploration practical. There's a chance CRISPR might play an important role in getting humans to Mars and beyond.

A team of researchers from Spain, France and the U.S. has found evidence of a glauconitic-like clay on Mars that suggests the planet once had habitable conditions. Phys.Org reports: In their paper published in the journal Nature Astronomy, the group describes their study of clay minerals extracted from Gale Crater by Curiosity rover back in 2016 and what they found. Back in 2016, NASA's Curiosity rover drilled into the Martian surface inside of Gale Crater. The rover then extracted samples of the clay minerals and used its instruments to analyze the material. In this new effort, the researchers have taken a close look at the results of the analysis and found that it very closely resembles glauconitic clays here on Earth.

Glauconite is an iron potassium phyllosilicate mineral. It is almost always found as ovoid shapes in sediment beds, carbonates and sandstones -- formation requires stable conditions over a long period. This is what makes the discovery of a similar clay on Mars so exciting -- it suggests that it likely formed under stable conditions for a long time, perhaps millions of years. And that suggests that for at least one part of Mars, conditions were, to some extent, suitable for life over millions of years. [...] The researchers note that their findings are not evidence of life on Mars, but suggest that there was a time during which conditions on the surface were favorable for its presence.

"China has released landing process footage from its Zhurong rover as well as video and sounds of the vehicle roving on Mars," reports Space News: Footage of the entry, descent and landing shows deployment of a supersonic disk-gap-band parachute, separation of the backshell, followed by powered descent, a hazard-avoidance hover phase, and landing... Video of the descent of the Zhurong rover from its landing platform, including sounds made by the vehicle's egress, was included in the release. The sounds were created by the metal on metal interaction of a rack and pinion system and recorded by Zhurong's climate station, which intends to capture sounds of Martian winds... The 240-kilogram Zhurong rover successfully landed in Utopia Planitia on May 14.

The deployment took place late May 21 Eastern, following a week-long series of checks and analysis of the environment. The six-wheeled, solar-powered Zhurong has since covered 236 meters on the Martian surface. An undated panorama shows Zhurong and tracks leading back to the landing platform, along with surface and horizon features...

The rover is part of the Tianwen-1 mission, China's first independent interplanetary mission. Consisting of an orbiter, a lander, and a rover, Tianwen-1 launched in July 2020. It entered Mars orbit February 10. Zhurong is equipped with six science payloads, including a laser-induced breakdown spectroscopy instrument for analysing surface elements and minerals, panoramic and multispectral imagers, a climate station, magnetometer and a ground-penetrating radar. It aims to return data on potential water-ice deposits, weather, topography and geology, complementing science carried out by missions from other space agencies.

The Tianwen-1 orbiter is currently in an 8.2-hour orbit, allowing a pass over Utopia Planitia once per sol to perform a data relay role. Zhurong has a primary mission and design lifetime of 90 sols (92 Earth days). It is currently unknown if Zhurong's mission will be extended beyond this.
Engadget argues that this footage from Mars "is as much about bragging rights as anything. Zhurong is part of China's first truly independent mission to another planet, and the country no doubt wants to highlight its accomplishments in as much detail as possible."

NASA has released a new video explaining the complicated, hour-long process required for the Mars rover to take a selfie (which was actually a composite of 62 separate images stitched together).

And meanwhile, CNN reports that its Ingenuity helicopter completed its eighth flight this week, "and even got a software update to fix an annoying issue that impacted some of its previous outings." On its latest outing, Ingenuity flew 525 feet (160 meters) to the south and southeast to a new airfield. This was the copter's third flight of the operations demo phase, in which Ingenuity is proving its usefulness as an aerial scout without interfering with the Perseverance rover's science mission — searching for evidence of ancient life on Mars... Ingenuity continues to do well, and the team is planning for more flights that will push its capabilities. And the helicopter is doing even better now that its troublesome "watchdog" software issue has been fixed. That was deployed before the eighth flight...

Ingenuity is also due for a navigation computer software update that will fix the issue that occurred during the chopper's sixth flight. Images captured by the navigation camera, which feed into the helicopter's navigation computer, had timing delays. Those images help Ingenuity to track its location, among other critical factors during flight. When the incorrect times and images were associated, it caused the chopper to wobble in the air. Ingenuity was able to land safely, but the team wants to prevent the issue from happening again so the chopper doesn't spiral out of control. It's also why the helicopter didn't capture any color images during its last two flights.

Hmmmmmm writes: China aims to send its first crewed mission to Mars in 2033, with regular follow-up flights to follow, under a long-term plan to build a permanently inhabited base on the Red Planet and extract its resources. The ambitious plan, which will intensify a race with the United States to plant humans on Mars, was disclosed in detail for the first time after China landed a robotic rover on Mars in mid-May in its inaugural mission to the planet. Crewed launches to Mars are planned for 2033, 2035, 2037, 2041 and beyond, the head of China's main rocket maker, Wang Xiaojun, told a space exploration conference in Russia recently by video link. Before the crewed missions begin, China will send robots to Mars to study possible sites for the base and to build systems to extract resources there, the official China Space News reported on Wednesday, citing Wang, who is head of the China Academy of Launch Vehicle Technology.

The BBC reports: China's Zhurong rover has sent back a batch of new images from Mars — including a "selfie". The robot, which landed in May, positioned a wireless camera on the ground and then rolled back a short distance to take the snap. To Zhurong's right is the rocket-powered platform that brought the six-wheeled vehicle to a soft touchdown. Both display prominent Chinese flags...

It weighs some 240kg. A tall mast carries cameras to take pictures and aid navigation; five additional instruments will investigate the mineralogy of local rocks and the general nature of the environment, including the weather. Like the current American rovers (Curiosity and Perseverance), Zhurong has a laser tool to zap rocks to assess their chemistry. It also has a radar to look for sub-surface water-ice - a capability it shares with Perseverance.
Slashdot reader InfiniteZero writes that the mission's "full resolution images including a 360 panoramic view of the landing site, can be found at the official CNSA website."

sciencehabit shares a report from Science Magazine: Venus can no longer wait. NASA will send two new robotic missions to Earth's hothouse twin, the agency's new administrator, Bill Nelson, announced this afternoon at his "State of NASA" speech here at the agency's headquarters. The missions, together costing up to $1 billion, mark NASA's first visit to the planet since the early 1990s, whereas nearby Mars has seen a host of robotic visitors. They're expected to launch by the decade's end.

The scientific case for exploring Venus has long been strong. No planet has more to say about how Earth came to be. Mars is tiny and frozen, its heat and atmosphere largely lost to space long ago. Venus could host active volcanoes, and it may have once featured oceans and continents, which are critical to the evolution of life. Plate tectonics roughly like Earth's might have held sway there, or might be starting today, hidden under the clouds. Venus also proves by example that orbiting within a star's "habitable zone" doesn't guarantee a planet is suitable for life. Understanding how Venus's atmosphere went bad and turned into a runaway greenhouse, boiling away any oceans and baking the surface, could help astronomers studying other solar systems distinguish truly Earth-like exoplanets from our evil twins.

A navigation timing error sent Nasa's Mars helicopter on a lurching ride, its first major problem since it took to the Martian skies last month. The Associated Press reports: The experimental helicopter, named Ingenuity, managed to land safely after the problem occurred, officials at the Jet Propulsion Laboratory said on Thursday. The trouble cropped up about a minute into the helicopter's sixth test flight on Saturday at an altitude of 10 meters (33ft). One of the numerous pictures taken by an onboard navigation camera did not register in the system, confusing the craft about its location. Ingenuity began tilting back and forth by as much as 20 degrees and suffered power consumption spikes, according to Havard Grip, the helicopter's chief pilot.

A built-in system to provide extra margin for stability "came to the rescue," he wrote in an online status update. The helicopter landed within five meters (16ft) of its intended touchdown site. Grip wrote: "Ingenuity muscled through the situation, and while the flight uncovered a timing vulnerability that will now have to be addressed, it also confirmed the robustness of the system in multiple ways. While we did not intentionally plan such a stressful flight, Nasa now has flight data probing the outer reaches of the helicopter's performance envelope."