From Viking to Perseverance, scientists have spent decades chasing chemical hints that could point to life beyond Earth.

Comet 3I/ATLAS is a rare visitor passing briefly through our solar system. Here’s how to find it in the night sky—and what you’ll need to catch a glimpse.

National Geographic has revealed the Pictures of the Year 2025, highlighting images by Nat Geo photographers that inspired and defined the past year. This year's showcase features 25 images that cover ...