0
$\begingroup$

How could you explain an alien race having the power of elasticity? By that I mean able to stretch out its limbs as if made of rubber. Think Mr. Fantastic or Elastigirl, but an entire species can do it.

enter image description here

enter image description here

The Kraaho of the Ben 10 universe have such abilities and are explained as coming from a very hot planet and being made of tungsten, but that's it.

$\endgroup$
1
  • $\begingroup$ Nope. Being able to stretch, is not so difficult. Being able to perform muscle movement any other than just contracting the stretched limb.... is a bit of a stretch of the laws of mechanics. You could kludge together a bit of stretchyness using pneumatic/hydraulic support structure to replace bones, but this would be very limited and would give variable rigid limbs, not the smooth flexibility you seem to be looking for. $\endgroup$
    – PcMan
    Apr 5 at 6:42
3
$\begingroup$

First of all you would rule out bones or the like, because they would impede stretching or compressing beyond a small amount. You see something like that in an octopus, who can pass through narrow passages just by squeezing its body through them, thanks to the lack of bones.

To have a rubber like behavior also the body would be made in a rubber like way: long and loosely bound molecular chains which, in the unstrained state are randomly garbled up and which with an imposed deformation tend to align in a single direction, allowing for elastic deformation.

However you would still be bound to the conservation of volume: a volume delimited by a surface of 10 square units and with a length of 10 units would stretch to 100 units of length with a cross section of 1 square units, but it would reach a point where it cannot stretch further (which is not a feature for Mr. Fantastic, AFAIK).

Overall I doubt that a creature with this feature would be much more different than a blob or a goo, because of the very way it is made. Nothing like a humanoid in the examples you gave.

$\endgroup$
1
  • $\begingroup$ Observationally, Mr.Fantastic and especially Elastigirl have not read the script on conservation of volume. They routinely stretch to 50x length, but only thin themselves down a bit, maybe to 1/3 thickness. $\endgroup$
    – PcMan
    Apr 5 at 18:53

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.