Untangling The Mystery Of Why Shoelaces Come Untied
Scientists at the University of California, Berkeley have figured out why shoelaces seem to come untied at the worst moments, like when you're running.
knots
Scientists Have Twisted Molecules Into The Tightest Knot Ever
This new knot has eight crossings, far more than previous molecular knots. The "rope" is very short — just 192 atoms long, or 500 times smaller than a red blood cell.