Why Humans Give Birth to Helpless Babies

Answering Questions about Boring Numbers, Disasters, Fusion, and More

How electrons move, multiple personalities form and hookworms spread among pet dogs

Math Games of Martin Gardner Still Spur Innovation

In what would be his centennial year, Martin Gardner, the longtime author of Scientific American's celebrated Mathematical Games column, continues to inspire mathematicians and puzzle lovers...

Martin Gardner Fans: Try These Mathematical Games

Enjoy Five Puzzles Posed in "Let the Games Continue," a celebration of Martin Gardner's legacy

Answers to Puzzles Posed in “Let the Games Continue”

Find answers to the mathematical and logical challenges posed in the article's "Test Yourself" box

How do hairs like those on the chest or in the nose know to grow when you trim them?