The story for kids
The first living things appeared in the ocean, so tiny that you can't see them with your eyes. They filled the air with oxygen, and the sky turned blue. Once, the whole Earth froze, like a snowball! And then the first animals appeared in the seas.
Facts
- The first life was very tiny – microbes in the ocean.
- They made oxygen from sunlight, and the sky turned blue.
- Once, the whole Earth froze over, like a snowball.
- Then the first animals appeared in the seas.
Numbers
- First life
- ~3.8 billion years ago
- First animals
- ~540 million years ago