This is episode one of a three-part series. You can listen to part two here and part three here. [CLIP: Wind howls] Rachel Feltman: When Tom Crawford climbed Mount Kilimanjaro and stood 5,895 meters ...

Pi (π) is probably the most famous number in mathematics. Not only have experts studied it extensively, but it also fascinates amateurs: books, films and songs have been dedicated to the number. Part ...

Clarification: This story has been updated to clarify how University of Colorado researchers handle their data collection. A student digs into a math problem that references his favorite superhero, ...