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What's Wrong With This Stamp?

Stacy Conradt

Look closely.

What Happens to Your Brain When You Black Out?

This Year, Print Out Your Halloween Costume

Rebecca OConnell

This Halloween, stand out from the crowd with a geometric animal mask.

Why Can’t We Feel the Earth Spinning?

Caitlin Schneider

Kids ask a lot of questions. mental_floss has answers. Here's the next story in WHY?, our new science-based series for kids (and parents!).

How Fire Ants Form Rafts to Survive Floods

Kirstin Fawcett

When water levels run high, the insects clump together and form a floating mass to survive.

A Man Swallowed His Dentures and Didn’t Know for 7 Days

Shaunacy Ferro

Add this one to the “doctors have seen it all” files.

A NASA Experiment Will Light Up the East Coast's Sky Tonight

Rebecca OConnell

11 Not-So-Miserable Facts About 'A Series of Unfortunate Events'

Emily Becker

How the elusive Lemony Snicket turned some rather, well, unfortunate events into a literary juggernaut.

The Missing Links: The Coolest Grandpa Ever

Colin Patrick

The Search for Baltimore’s Next Poe Toaster

Michele Debczak

As in the local tradition, not the kitchen appliance.

At What Ages Do Women First Have Kids in Each State?

Caitlin Schneider

Four decades of data show that women across the United States are waiting longer and longer to have kids.

'Hamilton' Uses Hip-Hop to Fit More Than 20,000 Words Into 2.5 Hours

Michele Debczak

The new show may possibly be the fastest-paced Broadway musical ever.

11 of the Fiercest Real-Life Pirates and the Seas They Ruled

Despite what some cartoons and amusement park rides may have led you to believe, pirates were generally not a charming lot.

Yale Releases 170,000 Images From the 1930s and 1940s

Shaunacy Ferro

Images from the United States Farm Security Administration and Office of War Information show what life was like during the Depression.

The Weird Week in Review

Miss Cellania

The weirdest news stories of hte week.