All puzzles are courtesy of Jigsaw Planet. Puzzle #6. Humanity has come a long way from the stone tools our ancestors invented millions of years ago. But sometimes the simple ones are still the best.

When it comes to analog hobbies, the humble jigsaw puzzle is one of life’s greatest choose-your-own-adventure options. You can do it solo or with friends. You can make it cooperative or competitive.

But about 100 million years ago, the tectonic plates tiled the planet as evenly as a real-life jigsaw puzzle. "The distribution of the large plates has not always been the same," said lead study ...

Last year correspondent Mo Rocca purchased a thousand-piece jigsaw puzzle of a 1933 Diego Rivera mural. He didn't expect to get to it until he was 80. Well, things have changed. And he is not the ...