Astronomy

Watch an Oort Cloud comet disintegrate before your eyes. Meanwhile, interstellar intruder 3I/ATLAS is brighter than expected.

The post Comet K1/ATLAS Crumbles, Interstellar Comet 3I/ATLAS Delights appeared first on Sky & Telescope.

All motion is relative. That simple fact makes tracking the motion of distant objects outside our galaxy particularly challenging. For example, there has been a debate among astronomers for decades about the path that one of our nearest neighbors, the Large Magellanic Cloud (LMC), took over the last few billion years. A new paper from Scott Lucchini and Jiwon Jesse Hand from the Harvard Center for Astrophysics grapples with that question by using a unique technique - the paths of hypervelocity stars.

AlphaEvolve, an AI system created by Google DeepMind, is helping mathematicians do research at a scale that was previously impossible - even if it does occasionally "cheat" to find a solution

AlphaEvolve, an AI system created by Google DeepMind, is helping mathematicians do research at a scale that was previously impossible - even if it does occasionally "cheat" to find a solution

Deep emotional distress after birth kills many mothers. A new kind of drug offers better, faster treatment

When anyone can forge reality, society can’t self-govern. Borrowing Denmark’s approach could help the U.S. restore accountability around deepfakes

Letters to the editors for the July/August Issue 2025 issue of Scientific American

Heimlich maneuver; training fleas

Solve a holey shape conundrum in this math puzzle

These valuable but difficult-to-extract metals are increasingly important to modern life

What can AI “griefbots” do for those in mourning?

Science in meter and verse

Milliseconds of variability, now detected by fitness watches, can improve well-being

Play this crossword inspired by the December 2025 issue of Scientific American

NASA spent years and billions of dollars collecting Martian samples to bring home. Now they might be stranded

As funding dries up, researchers face setbacks that threaten innovation and public progress

Ministerial Council 2025

Facing its worst drought in decades, Iran is attempting to stimulate rain by spreading seeding agents in clouds, but the technique is likely to have modest benefits at best