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It's for a good cause.

Shaunacy Ferro, Mental Floss

Algae have circadian rhythms, too.

Universal Pictures Home Entertainment

Billy Wilder co-wrote the script with Raymond Chandler—and they hated working together.

GWS

It sat in storage for almost a decade.

Warner Bros. Studio Tour London—The Making of Harry Potter

Beware of Death Eaters.

Photo illustration by Mental Floss. Milk Cartons: Courtesy of the National Child Safety Council. Background: iStock.

The idea was to protect children, but those billions of crime-stopping milk containers wound up scaring the crap out of them instead.

PunkToad, Flickr // CC BY 2.0

Polymath Park brings together four Wright-related homes not far from Fallingwater.

iStock

Nearly 2800 locations across the U.S. will ditch single-use bags in the next few years.

Film Rise

Decades after these segments aired, the producers behind the show are still wondering what happened.

iStock

The crustaceans are scaring off the insect's natural predators.

Dog shown actual size.

Here's why you're drawn to puppies, babies, dollhouses, micro-homes, and tiny supermarket foods in tiny grocery carts.

iStock

Regretful pet owners can drop off their fish, no questions asked.

Tyler Golden, Netflix

Netflix's fake-true crime series returns for a second (and poop-centric) season on September 14.

iStock

Tell your old backpack to take a hike.

Christie's

The portrait looks like it could be centuries old, but it was created by an algorithm.

NASA Goddard Space Flight Center

The spacecraft will use a robotic arm to scoop up a sample of Bennu and then return it to Earth.

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This discovery could have life-saving applications.

Keystone/Getty Images

Alan Alda—who was born Alphonso D’Abruzzo on January 28, 1936—is the only person to win acting, directing, and writing Emmys for the same program.

NASA

Huge news for future Moon explorers.

Fred Ramage, Keystone/Getty Images

A reporter coined the name.