like, birds. they move in sharp bursts. and squirrels. why do they do this and other animals, like bears, don’t?
In: Biology
The short answers is: they can.
Moving fast requires two things, ability to contract muscles fast and not hurting yourself in the process.
Larger the animal higher the mass the body parts have, if you were to contract your muscle at a speed humming bird contracts it’s, you woul tear your muscles or tendons, because to force required is so much higher due to higher mass.
This ratio scales especially badly, since the the relationship between size and mass is approximately a cube. Ie if you are twice as big you will weigh 8 times as much.
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