Their strength they're almost the strongest material, tensile strength material known.

Here are stress strain curves generated by tensile testing five fibers made by the same spider.

The only real problem with the ascending aorta in people with Marfan syndrome is it lacks some tensile strength.

So this makes quantifying silk properties by methods such as tensile testing, which is basically, you know, tugging on one end of the fiber, very amenable.

For now, the British upper lip seems to have regained some of its stiffness. One hopes that this will last long enough for British society to regain its stability and its much needed vigor.

What we discovered is whether you look at the leg of a human like Richard, or a cockroach, or a crab, or a kangaroo, the relative leg stiffness of that spring is the same for everything we've seen so far.