It turns out the inverse of the Hessian of a deep net is easy to apply to a vector. Doing this naively takes cubically many operations in the number of layers (so impractical), but it's possible to do...
Scientists studying Jurassic rocks in China found that cyclical changes in Earth's orbit affected not only the climate, but also the development of shale oil reserves....
The lunar crescent will disappear below the horizon before midnight on Jan. 22....
Here's what to know about staying warm and safe during freezing temperatures....
For decades researchers in northern Norway had tried to bring back vital kelp forests after overfishing damaged marine ecosystems. Now a simple solution is proving successful....
"Instead of Webb's 6.5-meter diameter, it's like we are observing this region with a 13-meter space telescope."...
After a four-year hiatus, conservationists in New Zealand are relieved that the flightless kākāpo is once again breeding. Fewer than 300 of the parrots exist....
Article URL: https://phys.org/news/2025-07-mammals-evolved-ant-eaters-dinosaur.html Comments URL: https://news.ycombinator.com/item?id=46683969 Points: 5 # Comments: 0...
A trial was about to launch for a vaccine that would ward off the HIV virus. It would be an incredible breakthrough. Then it looked as if it would be over before it started. (Image credit: Tommy Trenc...
Kimiya Yui released the timelapse footage to celebrate his 300th cumulative day spent orbiting Earth....
Dr. Sue Hwang, a radiation oncologist, said her own experience with breast cancer helped her see vulnerability as a strength instead of a weakness. Tim Brown Oncologist Sue Hwang was diagnosed with br...
The Core And Filament Formation/Evolution In Natal Environments (CAFFEINE) survey is an "astronomer's best friend," according to the European Southern Observatory....
AI pioneer Geoffrey Hinton warned that rapid advances could upend jobs, power, and humanity itself. JORGE UZON/AFP via Getty Images Geoffrey Hinton said he's very sad that the AI he helped create has ...
Ancient shoreline features hint that water on Mars once formed a vast ocean....
Article URL: https://www.wsj.com/tech/ai/anthropic-claude-code-ai-7a46460e Comments URL: https://news.ycombinator.com/item?id=46668424 Points: 7 # Comments: 1...
Both NASA’s James Webb Space Telescope and Chandra X-ray Observatory caught these two galaxies in a close embrace....
NASA's preparing for astronauts’ first lunar fly-around since 1972....
The Large Magellanic Cloud, or LMC, is a key spot for astronomers to study star formation....
Decades of human activity have left “irreversible damage” to the planet’s water supply, a new report warns....
The origin of super-Earths and sub-Neptunes has been revealed in a system of four young planets that are dramatically losing their thick atmospheres....