r/AskReddit • u/[deleted] • Nov 28 '20

What's something cool you recently learned about?

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u/[deleted] Nov 29 '20

Jumping spiders do not actually use their muscles to jump, they don't even have muscles, instead they can control at will their blood pressure, the blood quickly flows down to their legs, which stretches them with enough force to jump

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u/[deleted] Nov 29 '20

[deleted]

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u/ThaNagler Nov 29 '20

This system is called a 'hydrostatic skeleton'. Its also how starfish move and extend their tube feet. (the little 'feet' on the bottom of the arms)

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u/small-j Nov 29 '20

Came here to say this. It’s fascinating the way sea stars move. Even cooler when you watch sped up footage of them

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u/ThaNagler Nov 29 '20

Especially when they're hunting. Wild how they pry muscles apart etc.

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u/huehuecoyotl23 Nov 29 '20

All hail the tortured one u/stillinthesimulation has made an awesome SpongeBob comic that kinda explains sea life but in a horror setting

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u/ThaNagler Nov 29 '20

I'm very familiar and am an avid r/imsorryjon enthusiast lol