Did a collision with a giant asteroid or comet change the shape of life on Earth forever? It is widely agreed that such an object -- 10 kilometers across -- struck just off the coast of the Yucatan ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. On Oct. 25, 1671, the Italian astronomer Giovanni Cassini discovered a new moon at Saturn!

Comet 2025 Lemmon was first spotted in January this year, making its closest approach to Earth this month. It's still ...