CRF Blog

20 Things You Didn’t Know About … Rain

by Bill Hayes

Discover magazine looks at 20 Things You Didn’t Know About … Rain.

2. [A] 2015 study in Nature Geoscience concluded Earth’s early rain was made of iron. More than 4.5 billion years ago, bits of space rock vaporized upon impact with our still-forming planet, rose up in plumes of rock and iron, and then fell back down as rain.

3. Water-based rain dates back to at least the late Archaean Eon: Researchers have found fossilized raindrop imprints in 2.7 billion-year-old volcanic tuff in South Africa. [more]