It all began with an invitation to play. ‘Every day there’d be more people,’ recalls Suzanne Clarke. Slide 1 of 6 Suzanne ...

To celebrate Scientific American ’s 180th anniversary, we’re publishing a jigsaw every weekday to show off some of our most ...

Challenge your mind with today’s daily icon match puzzle. Match emojis and word cards to boost memory, focus, and problem-solving skills. Play this visual brain game now.