Did You Know? Purple Dye Was Once Incredibly Rare!
Ancient purple dye was made from sea snails, which made purple cloth very expensive.
Fun Facts
Ocean
Marine life, the deep sea, oxygen, and blue mysteries for curious kids.
13 fun facts in this category
Did You Know? Giant Kelp Can Make Underwater Forests!
Giant kelp grows tall in the ocean and creates shelter for many marine animals.
Did You Know? The Moon Helps Pull the Ocean Tides!
The Moon's gravity pulls on Earth's oceans, helping create high and low tides.
Did You Know? Corals Are Animals, Not Plants!
Coral reefs are built by tiny animals called polyps that live together in colonies.
Did You Know? Octopuses Have Blue Blood!
Octopus blood looks blue because it uses copper-rich hemocyanin to carry oxygen.
Did You Know? Fewer People Have Visited the Deepest Ocean Point Than the Moon!
The Mariana Trench is so deep and difficult to reach that very few people have visited its deepest area.
Did You Know? Sea Otters Sometimes Hold Hands While Sleeping!
Sea otters can hold paws while floating so they stay close together and do not drift apart.
Did You Know? The Blue Whale Is the Largest Animal Ever Known!
Blue whales are bigger than any dinosaur we know, making them the largest animals to have lived on Earth.
Did You Know? Tiny Ocean Life Helps Make Earth's Oxygen!
Tiny ocean plankton are so small you may not see them, but they help produce about half of Earth's oxygen.
Did You Know? Most of the Ocean Is Still Unexplored!
The ocean covers most of Earth, but a very large part of it is still unknown to scientists.
Did You Know? Dolphins Sleep With One Eye Open!
Dolphins can rest half their brain while the other half stays awake — so they literally sleep with one eye open!
Did You Know? An Octopus Has Three Hearts!
Octopuses have not one, not two, but THREE hearts — and their blood is blue!
Did You Know? Sharks Are Older Than Trees!
Sharks have been swimming in the oceans for over 400 million years — trees have only existed for about 350 million!