Astronaut food has come a long way from the freeze dried packets aboard the Apollo missions. During their historic lunar fly-by in April, the Artemis II crew dined on beef brisket, mac and cheese, quiche, and a lot of tortillas. The same can be said for the hungry inhabitants of the International Space Station (ISS). With regularly scheduled restocks, the astronauts don’t have to worry as much about issues like shelf life. That means that even when nearly 250 miles above Earth, ISS residents can still snack on fresh fruit and vegetables.

NASA highlighted one such astronaut grocery delivery in a photo released on May 14. Taken on April 19, astronauts Jack Hathaway, Jessica Meir, Chris Williams, and Sophie Adenot are seen in microgravity alongside what are presumably upcoming snacks like oranges, apples, peppers, and one conspicuous onion.

Food wasn’t the only precious cargo on the Cygnus XL spacecraft visit that month, however. In addition to the colorful produce, the ISS also received over 2,300 pounds of research hardware and science equipment. These materials encompass the tools the crew needs for their research on blood stem cells for cancer treatments and ways to strengthen astronaut gut health. The ISS is now also home to a new exercise machine, courtesy of the European Space Agency, as well as replacement nitrogen and oxygen tanks for spacesuits.

The post ISS astronauts pose with fresh fruit in microgravity appeared first on Popular Science.

After five years of rolling across Mars, NASA’s Perseverance rover is still going strong. And it has the selfies to prove it. NASA highlighted its “six-wheeled scientist’s” latest Red Planet excursion in a mission update on May 12, explaining that the explorer is currently engaged in the Northern Rim Campaign. This is Perseverance’s fifth project since arriving on Earth’s planetary neighbor in February 2021.  Compiled from 61 separate photos taken in March, the latest scene depicts Perseverance near a region known as Lac de Charmes.

“We took this image when the rover was in the ‘Wild West’ beyond the Jezero Crater rim—the farthest west we have been since we landed at Jezero a little over five years ago,” Perseverance project scientist Katie Stack Morgan said in a statement.

Prior to snapping its selfie, the rover had just finished abrading the rocky Arethusa outcrop. This task involves using the drill on its robotic arm to grind a section of the geological formation, which then offers scientists back on Earth the materials necessary to analyze its composition. After remotely examining the rock’s chemistry, researchers learned Arethusa is largely igneous minerals dating even further back than the Jezero Crater itself. The outcrop likely formed underground millions of years ago from molten material.

The latest portrait is the sixth selfie taken by Perseverance since arriving on Mars. To pull it off, the rover relied on its Wide Angle Topographic Sensor for Operations and eNgineering (WATSON) camera installed at the end of its robotic arm. It took about one hour to accomplish and required 62 extremely fine-tuned movements to ensure the clearest shot possible.

Lest anyone think Perseverance is too narcissistic, the rover also employed its Mastcam-Z to also photograph Lac de Charmes’ Arbot area a few days later. The vista scene is the result of 46 combined images, and will help NASA plot out a route to further investigate the ridge. Thanks to the new vantage points, scientists already think they have spotted a few megabreccia—massive chunks of rock as big as skyscrapers that were launched during a meteorite impact about 3.9 billion years ago.

“The rover’s study of these really ancient rocks is a whole new ballgame,” Stack Morgan explained. “These rocks—especially if they’re from deep in the crust—could give us insights applicable to the entire planet, like whether there was a magma ocean on Mars and what initial conditions eventually made it a habitable planet.”

The post Mars rover snaps a selfie near skyscraper-sized boulders appeared first on Popular Science.

New satellite images are helping scientists understand a major tsunami that changed the landscape of a popular tourist destination in Alaska forever. 

On August 10, 2025, a tsunami larger than the Eiffel Tower ripped through Tracy Arm fjord in southeast Alaska. The rapid retreat of the South Sawyer Glacier triggered a landslide that swept huge rocks down the picturesque waterway visited by millions aboard Alaskan cruises every summer. At least 64 million cubic meters of rock slid down the slope of the glacier. The rocks created an enormous tsunami that stripped trees and other vegetation from the opposing fjord wall up to 1,578 feet above sea level. 

The NASA-USGS Landsat satellite images show the dramatic changes to the landscape. In one photo taken on July 26, 2025, the fjord is surrounded by green vegetation. 

In the second image, taken nine days after the landslide on August 19, the fjord is dominated by a gray scar made by the cascading rock. 

“The bright landslide scar on the north side of the fjord is striking, as is the ‘bathtub’ ring around the fjord showing the areas where the forest was leveled by the tsunami,” said Dan Shugar, a geomorphologist at the University of Calgary.

Sawyer Island, located about 6 miles away from the landslide, also turned from green to brown. Only a few trees still stood at the island’s higher elevations.

Over the past several months, Shugar and his colleagues combined satellite, airborne, and ground-based observations with eyewitness accounts and simulations to build a complete story with how this historic event transformed. Their analysis was published May 6 in the journal Science.

Their analysis found that water continued to slosh around the fjord for more than one day. Geologists call this water-sloshing phenomenon a seiche. Both the landslide and resulting seiche produced seismic signals that were detected around the world and equivalent to a magnitude 5.4 earthquake.

The Landsat images also show that the South Sawyer Glacier retreated significantly in less than a month. Typically, glacial retreat takes much longer. 

“Part of that occurred between the date of the first image and the date of the landslide,” Shugar said. “But part of it is from the landslide itself, which broke off a big chunk of the terminus of South Sawyer Glacier, resulting in a slurry of icebergs in the fjord.”

Fortunately, no one was injured in the event, largely because it occurred around 5:30 a.m. local time. The wave did sweep away some gear from a group of kayakers camping on Harbor Island near the fjord’s mouth. Passengers aboard a small cruise ship in neighboring Endicott Arm also reported swings in water levels and a strong current associated with the tsunami. 

In response to the event, at least six cruise lines have eliminated the Tracy Arm fjord from their itineraries for 2026 due to the hazards. The United States Geological Survey also warns that steep, mountainous landslide areas are “inherently unstable” and that the Tracy Arm fjord tsunami will likely continue to change the landscape.

The post NASA satellite images show how a massive tsunami in Alaska changed the landscape forever appeared first on Popular Science.

Curiosity got itself stuck between a rock and hard place last month, but NASA says there’s no reason to fret about the intrepid Mars rover. On April 25, mission engineers were remotely piloting its robotic arm’s rotary-percussive drill into a Martian rock nicknamed Atacama. It’s a relatively routine task for Curiosity, which takes the samples and then pulverizes them into a powder for future onboard chemical analysis.

But Atacama is no small stone. The hefty, 1.5-foot-wide geologic formation is about six inches thick and weighs about 28.6 pounds. So NASA engineers were understandably a bit worried when Curiosity attempted to retract its arm—and subsequently lifted the entire rock off the ground.

“Drilling has fractured or separated the upper layers of rocks in the past, but a rock has never remained attached to the drill sleeve,” the agency explained in a recent rundown.

While amusing to envision, the situation was no laughing matter for NASA’s engineers. The rover’s drill would be of little more use with a giant rock indefinitely attached to it. But even if controllers could detach Atacama from the rover, the force might damage the tool or the arm itself. Without those capabilities, Curiosity’s ongoing mission would be in serious jeopardy.

Mission specialists first tried the drilling version of “turning it off and on again,” by vibrating the tool. However, Atacama remained stubbornly stuck on Curiosity…for another four days. NASA then tried a new approach by reorienting the robotic arm and instructing the drill to vibrate one more time. Atacama managed to shake off a bit of sand that time, but little else.

Two more stressful days passed before NASA gave it a third try. Engineers tilted the drill slightly further, then rotated and vibrated the tool while also spinning its drill bit. The Curiosity team anticipated it may take multiple attempts to pull off the feat.But in this case, Atacama finally gave way almost immediately. The nearly weeklong ordeal culminated with the giant rock fracturing as it landed on the Martian ground.

So far, NASA hasn’t reported any lingering damage to the vehicle, meaning the rover is likely ready to continue exploring the Red Planet. As for Atacama, it seems the Martian rock learned a valuable lesson: Don’t mess with Curiosity.

The post For 6 days, NASA’s Mars rover battled a rock appeared first on Popular Science.

Research & Developments is a blog for brief updates that provide context for the flurry of news that impacts science and scientists today.

To date, astronomers have confirmed the existence of just under 6,300 exoplanets. New research could more than double that number, adding a potential 10,000 new planets in one fell swoop.

Yes, that’s right. A 1 with 4 zeros.

The T16 project has announced the discovery of 10,091 exoplanet candidates observed by NASA’s Transiting Exoplanet Survey Satellite (TESS). Since 2018, the all-sky survey has been monitoring more than 200,000 nearby stars using the transit method, which detects the faint dip in a star’s light when a planet crosses in front of it. Astronomers typically require 3 dips to be sure that what they’re seeing is actually a planet and not a one-off event such as an asteroid or comet in that distant star system.

The T16 project analyzed the light curves of more than 54 million stars observed during the first year of the TESS mission. The project’s analysis technique allowed it to search for planets around stars up to 16 times fainter than TESS typically searches, drastically increasing the field of discovery.

Their pipeline detected 11,554 planet candidates. Of those, 1,052 of those had been detected previously and 411 only had one transit—not enough to confirm a planet.

That leaves 10,091 potential new planets. That’s more than were detected in the entirety of NASA’s Kepler mission and its follow-on K2 and more than double the existing planet candidates from TESS that await confirmation. These discoveries will be published in the Astrophysical Journal Supplement.

All of the new planet candidates orbit their stars quickly, with orbital periods between 12 hours and 27 days. Although most of the stars that TESS observes are smaller and cooler than the Sun, those close orbits likely mean that most of those planets are far too hot to be habitable.

The T16 project team confirmed the planet-hood of one of their candidates not using the transit method, but a different method that measures the gravitational tug a planet exerts on its host star. That planet, TIC 183374187, is hot and slightly larger than Jupiter.

The remaining 10,090 newly discovered planet candidates require additional verification to determine whether they truly are planets or not. But given the rigor of the team’s analysis and the requirement of at least 3 transits to even make this list, it’s likely that most of the new discoveries are indeed planets.

“Astronomers are a bit conservative when it comes to claims like this, and want to be sure they pass a bunch of tests to make sure everything was done correctly and these planets actually exist,” astronomer Phil Plait wrote in his Bad Astronomy Newsletter. “Having said that, the process the astronomers went through looks legit to me, and I would bet the majority of these new candidates are real. That’s amazing.”

—Kimberly M. S. Cartier (@astrokimcartier.bsky.social), Staff Writer

These updates are made possible through information from the scientific community. Do you have a story about science or scientists? Send us a tip at eos@agu.org.

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NASA's Perseverance rover sent a selfie from Mars taken against the sweeping backdrop of a region scientists call the ‘Lac de Charmes.'

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