In the previous episode #13, we looked at what happens when three spheres—planets, soap bubbles, and water droplets—collide.

Earth is so far the only known planet on which life exists—with liquid water and a stable atmosphere. However, the conditions were not conducive to life when it formed. The gas-dust cloud from which ...

Rocks from Canada, Greenland, and Hawai'i have less of the already rare isotope potassium-40 than those from the rest of the Earth. The scientists who discovered this fact consider it evidence that ...

New modeling studies that factor in geologic strength found fundamental changes in how the moon may have formed from the collision between a Mars-sized impactor and Earth. Simulations using older ...

One bright day on Earth about 4.5 billion years ago, everything changed. A massive object slammed into the young planet. The impact was so large that bits were flung out into space, eventually ...