A newly discovered ancient Martian meteorite provides rare physical evidence of Mars's early crust, challenging the assumption that most recovered samples are geologically young.
AI-generated summary. Check the original reporting for context and accuracy.
This is the available feed excerpt, which may be shortened or in the publisher’s original language.
Crater counts tell us that most of the Martian surface is more than 3 billion years old, but pieces of Mars we have on Earth tell a different story. The three main classes of Martian meteorites—shergottites, nakhlites, and chassignites—are all 2.4 billion years old or younger. Until now, only two genuinely ancient Martian meteorites were known: Allan Hills 84001, found in Antarctica, and a jumbled rock from northwest Africa nicknamed Black Beauty. Now we have a third one. A team led by Yang Liu, a planetary scientist at NASA's Jet Propulsion Laboratory, has shown that a Martian meteorite called Teghaza 001, found in the Sahara Desert in Mali in 2022, formed at least 4.1 billion years ago. “It's very old and similar to some of the oldest rocks on Earth,” Liu says. A filtered collection “We don't fully understand why old Martian rocks are so rare on Earth," Liu said. Part of the answer may lie in how a piece of Mars gets here. It takes a large impact to launch a rock off the planet, and not every rock can survive that. “If the impact hits into loose powder, it may not get cemented to become a rock and fly off Mars' gravity,” Liu said. “So the natural impact already acts as a filter. Weak rocks do not make it off Mars.”Read full article Comments
An automated sorting aid based on source trust, keywords, and entities, on a scale of 1–12. High: 9–12; medium: 6–8; low: 1–5. It does not measure urgency, verify reporting, or indicate editorial endorsement.
Sam Altman argues that prioritizing data center RAM over personal PC memory is essential for efficient AI scaling, challenging the assumption that local inference is the optimal solution.
A supply chain attack compromised thousands of developer machines via malicious Claude extensions, though flawed code accidentally limited the attacker's full access.
Major AI companies are adopting a universal opt-out standard, allowing publishers to block scraping across all platforms with a single setting instead of managing individual requests.