This Spider Has Three Super Powers -- It Can Leap 50 Times Her Own Body Length

Submitted by: Gerry1of1 5 months ago in Science Weird


From the BBC: Known for eating other spiders, Portia is a genus of the jumping spider that is able to leap up to 50 times her own body length. Captured by stunning close up footage, we get to witness this amazing spider use its super powers to dine on prey three times her size.
There are 14 comments:
Male 1,512
Mother Nature is an evil bitch.
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Male 5,413
I like this spider... she has some killer moves.

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Male 433
If you scale a body by 2, it's mass will be eight times the original, but the section of a muscle will just be four times as big (square-cube-law) - half the power per weight. Thus comparing by body length is exactly wrong.
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Male 662
7eggert Muscle size tends to be irrelevant in spiders. The natural state of the muscles they have naturally contract, which is why you usually find them all curled up when they're dead. They uncurl them by pushing fluid out into the limbs, forcing the muscles to expand. So their 'strength', as it were, is based almost entirely on the speed at which they can move this fluid into and out of the limbs. It's more hydraulics than muscle mass.

The more you know!
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Male 5,413
profworm Dear Professor Worm:

How does this observation of yours impact spiders crawling into your mouth while you sleep? I need to know how this relates to the information I care most about. 

Thanking you in advance,
   I am, 
      Sincerely yours, 

Horatio Q. Squrlz.
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Male 662
squrlz4ever Dear H.Q.Squrlz :

It makes them very good at it.

Yours truly,
Professor Worm
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Male 5,413
profworm O.O  Just as I feared.
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Male 6,259
squrlz4ever Don't worry about the Goliath  Bird Eating spider (Should be More aptly known as Rodent eater) crawling in your mouth, Its fangs are as long as your head
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Male 5,413
7eggert Can you explain this a bit for some of the slower squirrels in the audience? I get the 8X mass thing... but I'm a little fuzzy on the "section of a muscle" part.
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Male 433
squrlz4ever It has been explained in the  SquirrelGirl comics:

https://en.wikipedia.org/wiki/Square–cube_law#Biomechanics
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Male 5,413
7eggert Okay, got it. The term that had me puzzled ought to have been cross section, not section. Many thanks.
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Female 4,645
squrlz4ever heh... fuzzy
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Male 5,413
melcervini Pun was intended, but I wasn't sure anyone would pick up on it. You're a smart cookie, Mel.
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Male 662
https://www.youtube.com/watch?v=vQmkn_NR4nk

Adorable.
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