Recent developments and news in the world of science.
Mystery of why shoelaces come undone unravelled by science
Mystery of why shoelaces come undone unravelled by science - BBC News
You put on your shoes, tie them as firmly as possible, but soon after the laces come undone. Now scientists think they know what causes one of life's knotty problems. They found the force of a foot striking the ground stretches and then relaxes the knot, while a second force caused by the leg swinging acts on the ends of the laces, like an invisible hand.
bbc.com



