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Mars rover data confirms ancient lake sediments on red planet

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NASA’s rover Perseverance has gathered data confirming the existence of ancient lake sediments deposited by water that once filled a giant basin on Mars called Jerezo Crater, according to a study published on Friday.

The findings from ground-penetrating radar observations conducted by the robotic rover substantiate previous orbital imagery and other data leading scientists to theorize that portions of Mars were once covered in water and may have harbored microbial life, Reuters reported.

The research, led by teams from the University of California at Los Angeles (UCLA) and the University of Oslo, was published in the journal Science Advances, opens new tab.

It was based on subsurface scans taken by the car-sized, six-wheeled rover over several months of 2022 as it made its way across the Martian surface from the crater floor onto an adjacent expanse of braided, sedimentary-like features resembling, from orbit, the river deltas found on Earth.

Soundings from the rover’s RIMFAX radar instrument allowed scientists to peer underground to get a cross-sectional view of rock layers 65 feet (20 meters) deep, “almost like looking at a road cut,” said UCLA planetary scientist David Paige, the first author of the paper.

Those layers provide unmistakable evidence that soil sediments carried by water were deposited at Jerezo Crater and its delta from a river that fed it, just as they are in lakes on Earth. The findings reinforced what previous studies have long suggested – that cold, arid, lifeless Mars was once warm, wet and perhaps habitable.

Scientists look forward to an up-close examination of Jerezo’s sediments – thought to have formed some 3 billion years ago – in samples collected by Perseverance for future transport to Earth.

In the meantime, the latest study is welcome validation that scientists undertook their geo-biological Mars endeavor at the right place on the planet after all.

Remote analysis of early core samples drilled by Perseverance at four sites close to where it landed in February 2021 surprised researchers by revealing rock that was volcanic in nature, rather than sedimentary as had been expected.

The two studies are not contradictory. Even the volcanic rocks bore signs of alteration through exposure to water, and scientists who published those findings in August 2022 reasoned then that sedimentary deposits may have eroded away.

Indeed, the RIMFAX radar readings reported on Friday found signs of erosion before and after the formation of sedimentary layers identified at the crater’s western edge, evidence of a complex geological history there, Paige said.

“There were volcanic rocks that we the landed on,” Paige said. “The real news here is that now we’ve driven onto the delta and now we’re seeing evidence of these lake sediments, which is one of the main reasons we came to this location. So that’s a happy story in that respect.”

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‘Massive cyberattack’ brings down Elon Musk’s X

Digital Trends reported Tuesday that there are reports suggesting X is still having issues

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Social media platform X went down intermittently on Monday, with owner Elon Musk blaming an unusually powerful cyberattack.

“We get attacked every day, but this was done with a lot of resources. Either a large, coordinated group and/or a country is involved,” Musk said in a post on X on Monday.

He did not clarify exactly what he meant by “a lot of resources” and his comments drew skepticism from cybersecurity specialists, who pointed out that attacks of this nature — called denials of service — have repeatedly been executed by small groups or individuals.

X faced intermittent outages, according to Downdetector, Reuters reported.

Digital Trends meanwhile reported Tuesday that there are reports suggesting X is still having issues. 

Internet industry experts have said X was hit by several waves of ‘denial of service’ throughout Monday. 

Musk said in an interview with Fox Business Network’s Larry Kudlow the cyberattack came from IP addresses originating in the Ukraine area.

An industry source told Reuters he disputed Musk’s account, saying that large chunks of the rogue traffic bombarding X could be traced back to IP addresses in the United States, Vietnam, Brazil and other countries, and that the amount of rogue traffic coming directly from Ukraine was “insignificant.”

In any case, denial of service attacks are notoriously hard to trace back to their authors and the IP addresses involved rarely provide any meaningful insight into who was behind them, Reuters reported.

Musk has joined U.S. President Donald Trump, whom he serves as an adviser, in criticizing Ukraine’s continued efforts to fight off a Russian invasion. 

Musk said on Sunday that Ukraine’s front line “would collapse” without his Starlink satellite communications service, though he said he would not cut off Ukraine’s access to it.

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NASA says ‘city killer’ asteroid has a 3.1 % chance of striking Earth in 2032

Despite the rising odds, experts say there is no need for alarm

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An asteroid that could level a city now has a 3.1-percent chance of striking Earth in 2032, according to NASA data released Tuesday — making it the most threatening space rock ever recorded by modern forecasting.

Despite the rising odds, experts say there is no need for alarm. The global astronomical community is closely monitoring the situation and the James Webb Space Telescope is set to fix its gaze on the object, known as 2024 YR4, next month.

“I’m not panicking,” Bruce Betts, chief scientist for the nonprofit Planetary Society told AFP.

“Naturally when you see the percentages go up, it doesn’t make you feel warm and fuzzy and good,” he added, but explained that as astronomers gather more data, the probability will likely edge up before rapidly dropping to zero.

2024 YR4 was first detected on December 27 last year by the El Sauce Observatory in Chile.

Astronomers estimate its size to be between 130 and 300 feet (40–90 meters) wide, based on its brightness. Analysis of its light signatures suggests it has a fairly typical composition, rather than being a rare metal-rich asteroid.

The International Asteroid Warning Network (IAWN), a worldwide planetary defense collaboration, issued a warning memo on January 29 after the impact probability had crossed one percent. Since then, the figure has fluctuated but continues to trend upward.

NASA’s latest calculations estimate the impact probability at 3.1 percent, up from 1.6 percent last month, with a potential Earth impact date of December 22, 2032.

Richard Moissl, head of the European Space Agency’s planetary defense office, which puts the risk slightly lower at 2.8 percent told AFP that  this “is not a crisis at this point in time. This is not the dinosaur killer. This is not the planet killer. This is at most dangerous for a city.”

If the risk rises over 10 percent, IAWN would issue a formal warning, leading to a “recommendation for all UN members who have territories in potentially threatened areas to start terrestrial preparedness,” explained Moissl.

Unlike the six-mile-wide (10-kilometer-wide) asteroid that wiped out the dinosaurs 66 million years ago, 2024 YR4 is classified as a “city killer” — not a global catastrophe, but still capable of causing significant destruction.

Its potential devastation comes less from its size and more from its velocity, which could be nearly 40,000 miles per hour if it hits.

If it enters Earth’s atmosphere, the most likely scenario is an airburst, meaning it would explode midair with a force of approximately eight megatons of TNT — more than 500 times the power of the Hiroshima bomb.

But an impact crater cannot be ruled out if the size is closer to the higher end of estimates, said Betts.

The potential impact corridor spans the eastern Pacific, northern South America, the Atlantic, Africa, the Arabian Peninsula, and South Asia — though Moissl emphasized it is far too early for people to consider drastic decisions like relocation.

The good news: there’s ample time to act.

NASA’s 2022 DART mission proved that spacecraft can successfully alter an asteroid’s path, and scientists have theorized other methods, such as using lasers to create thrust by vaporizing part of the surface, pulling it off course with a spacecraft’s gravity, or even using nuclear explosions as a last resort. — Agence France-Presse

 

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Panjshir will soon be connected to national fiber optic network

The statement said that this project covers a 36-kilometer route from Gulbahar to Bazarak, and the districts of Shatal, Anaba and Rukha will also benefit from fiber optic services.

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The Panjshir provincial media office said in a statement on Wednesday, February 1 that practical work was to connect the province to fiber optic will begin within the next month.

The statement said that this project covers a 36-kilometer route from Gulbahar to Bazarak, and the districts of Shatal, Anaba and Rukha will also benefit from fiber optic services.

The statement added that the project is being implemented by Afghan Wireless, Afghan Telecom and ICG companies as a result of the efforts of the Panjshir provincial administration and the special attention of the leadership of the Ministry of Communications and Information Technology of the Islamic Emirate of Afghanistan.

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