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so that's a complex question this one's

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a little technical

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whales don't sleep like we sleep

4
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they have something called um

5
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semi-semi-hemispheric

6
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sleeping in that whales are voluntary

7
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breathers this is true for all cetaceans

8
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so they can't fully go to sleep or they

9
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would forget to breathe and they would

10
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drown or suffocate rather so they have

11
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two sides of their brain and what

12
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they'll do is they'll put one side of

13
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their brain to sleep and the other side

14
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will stay awake to remember to function

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you know to take a breath to stay at the

16
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surface of the water and things like

17
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that and then they switch and the other

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side of their brain will go to sleep and

19
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the other side of their brain will stay

20
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awake

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um and we know this from um from

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scientists i wish i could remember their

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names right now who have

24
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done this with dolphins and other

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citations you know they've put

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anodes and whatnot on on patient heads

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and looked at brain activity so