Mental Floss

NEWS

On January 30, 1925, Kentucky cave explorer Floyd Collins went underground—and didn’t come out. The epic effort to rescue him gripped national headlines and transformed into a battle between heroism and folly, selflessness and selfishness, life and death.

Lucas Reilly








Still from ‘Picnic At Hanging Rock.’

Peter Weir’s Australian New Wave classic turns 50 this year. Here’s what you need to know about the film, from the off-limits question Weir asked book author Joan Lindsay to the spooky stuff that happened on set.

Matthew Jackson
Dog whistles can make training easier.

The ultrasonic training instruments are easy to use. But there’s a dark history behind their inventor—and their initial purpose.

Jake Rossen








Red hair and freckles are two traits partially determined by genes.

Humans are now known to have between 20,000 and 25,000 genes, but researchers still have much to learn about these small segments of DNA.

Emily Petsko