NPR
Special fibers that change color when they are under strain have helped scientists come up with some simple rules that can predict how a knot will perform in the real world.
There's a whole field of mathematics that studies knots, to explore abstract properties of idealized curves. "But that's not what you care about if you are, for example, a sailor or a climber and you need to tie something which holds," says Vishal Patil, a graduate student at the Massachusetts Institute of Technology whose new findings appear in the journal Science.