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Nature Podcast
How Elephant Seals Sleep at Sea
Sleeping at sea can be quite hard. Different mammals have different ways of doing it. Some fur seals and dolphins do that uni-hemispheric sleep thing. So, you know, if a predator comes along, they can be awake really quickly and run away. But this researcher wanted to know, okay, how do the elephant seals manage it? She invented a kind of device like a sort of electroencephalography device. It can read brain waves, heart rates, as well as logging where the seal is, the depth and how they're moving.
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