Learn English: How Do Seals Stay Underwater So Long? (easy)
1 week, 6 days ago
Seals are super swimmers who can stay underwater for a very, very long time!
They're much better at swimming underwater than people are; people need air tanks to do that.
Scientists learned that seals know exactly how much air is left in their bodies.
This helps them plan their underwater trips so they don't run out of air and drown!
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