The Earth is about 4.5 billion years old. Actual dirt — that is to say, like the stuff in your backyard, not rocks that were once dirt — probably dates to about 2 million years ago. Dirt is young! (Relatively speaking.)
The Earth is about 4.5 billion years old. Actual dirt — that is to say, like the stuff in your backyard, not rocks that were once dirt — probably dates to about 2 million years ago. Dirt is young! (Relatively speaking.)