What lives at the bottom of the ocean?
If you dove down, down, down past where sunlight fades to black, you'd reach the deep ocean floor — a cold, dark world under crushing pressure. It sounds like nowhere anything could live. But it turns out the bottom of the ocean is packed with some of the strangest, toughest, most wonderfully weird creatures on Earth.
First, it's dark down there — really dark, like a closet at midnight with no windows. Sunlight can't reach past about 1,000 meters, so the deep ocean has been pitch black for hundreds of millions of years. The animals that live there have adapted: many make their own light through bioluminescence, chemical reactions in their bodies that glow blue or green. It's like living in a neighborhood where everyone carries their own lantern.
