The explanation for the original comic book Spider-Man, for instance, was that he could bond himself to surfaces through an electrostatic force. There is no single explanation for Spider-Man’s ability to stick to and climb walls. "A spider that's jumping increases the blood pressure in jumping legs to such an extent that if the spider had a doctor that doctor would go through the roof about it.” Wall-crawling So when they extend the leg in order to jump, that is not done by a muscle, it's done by hydraulic pressure of blood. Spider legs do not have extensor muscles at all. "Also, spider jumping is done in a quite different manner from the jumping of a being like us that has internal bones in our legs that are surrounded by muscle. Jumping spiders are extremely good jumpers. “House spiders are not particularly good jumpers. But in an absolute sense that item is still extremely light.” AgilityĪnd how about movement such as jumping? “Some are good at jumping, some aren’t,” says Crawford. Spiders have about as much strength as insects of the same size range, and a spider in a web is able to lift a prey item that weighs a few times more than the spider. The larger you are the harder it is to lift large objects because the weight of the large object increases a great deal faster than your own strength. “The smaller you are the easier it is to lift large objects because the large object itself simply does not weigh very much. “Strength does not scale directly with size,” says Crawford. What this essentially means is that as an object grows larger, so too does the strain and demands on that object.
He cites the square-cube law, a mathematical principle which states that when an object undergoes a proportional increase in size, its new volume is proportional to the cube of the multiplier and its new surface area is proportional to the square of the multiplier. Therefore, if a human possessed the abilities of a spider, they too could lift many times their own weight.īut Crawford is sceptical of that idea. Spider-Man’s super strength is based on the idea that a spider can lift many times its own weight.
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