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A Slowed-Down Windows XP Start-Up Sound Becomes Oddly Eerie

Mental Floss UK

This would certainly slow down your morning routine.

Sculptures and Bowls Made With Recycled Keys and Coins

Rebecca OConnell

Using keys, coins, and sometimes bottle caps, this artist makes unique soldered sculptures.

When Orcas Helped Hunters Kill Other Whales

Shaunacy Ferro

A dark tale of human-whale cooperation.

Beautiful Electricity Pylons That Look Like Metallic Nomads

Mental Floss UK

These pylons were designed to complement Iceland's volcanic landscape, but they never made it off the drawing board.

Scientists Are Trying to Save Historic Trees By Cloning Them

Anna Green

They're preserving iconic trees for future generations.

6 Times the World Was Supposed to End in the Past Decade

Nick Greene

According members of the eBible Fellowship, a Pennsylvania-based online religious sect, the world will end on October 7, 2015 (that's today, for those who don't have a calendar handy).

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.

17 Wondrous Facts About 'That Thing You Do!'

Roger Cormier

The Oscar-nominated film—written, directed by, and starring Tom Hanks—features one of cinema's great earworms.

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.