Jigsaw puzzle strategy tips and advice For some people, solving a jigsaw puzzle is a relaxing activity, and their preferred way of winding down at the end of the day. For others, it’s a race to ...

Problem solving goes back to the Stone Age, says David Corcoran, science editor at The Times. "They were inventing fire and the wheel; now we're filling in the answer to 26 down," he tells NPR's ...