Reality Check
Penultimate Amazing
A delusion that birds use "almost the same principle" as jellyfish to move
How do jellyfish swim?
The surprising trick jellyfish use to swim
Jellyfish use jet propulsion or row using cilia or undulate.
Birds do not have jets or cilia and do not undulate their wings. Birds flap their wings because aerodynamic lift needs flows of air across the wings. They cup their wings on takeoff and landing because that produces the highest lift (aircraft use wing flaps for the same purpose on takeoff and landing).
14 November 2019 MasterOgon: A delusion that birds use "almost the same principle" as jellyfish to move.Myriad, you're right. But there are still birds using almost the same principle in the air....
How do jellyfish swim?
The surprising trick jellyfish use to swim
Jellyfish use jet propulsion or row using cilia or undulate.
Birds do not have jets or cilia and do not undulate their wings. Birds flap their wings because aerodynamic lift needs flows of air across the wings. They cup their wings on takeoff and landing because that produces the highest lift (aircraft use wing flaps for the same purpose on takeoff and landing).
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