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

Submitted by: Gerry1of1 11 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 2,010
Mother Nature is an evil bitch.
0
Reply
Male 7,254
I like this spider... she has some killer moves.

0
Reply
Male 642
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.
0
Reply
Male 779
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!
0
Reply
Male 7,254
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.
0
Reply
Male 779
squrlz4ever Dear H.Q.Squrlz :

It makes them very good at it.

Yours truly,
Professor Worm
1
Reply
Male 7,254
profworm O.O  Just as I feared.
0
Reply
Male 7,021
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
0
Reply
Male 7,254
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.
0
Reply
Male 642
squrlz4ever It has been explained in the  SquirrelGirl comics:

https://en.wikipedia.org/wiki/Square–cube_law#Biomechanics
0
Reply
Male 7,254
7eggert Okay, got it. The term that had me puzzled ought to have been cross section, not section. Many thanks.
0
Reply
Female 5,553
squrlz4ever heh... fuzzy
1
Reply
Male 7,254
melcervini Pun was intended, but I wasn't sure anyone would pick up on it. You're a smart cookie, Mel.
1
Reply
Male 779
https://www.youtube.com/watch?v=vQmkn_NR4nk

Adorable.
0
Reply