brain - Trivia, Quizzes, and Brain Teasers | Mental Floss

Scientists Aren't Sure Why Our Eyes Move Rapidly During Sleep. A New Study Offers a Novel Theory

Oksana Restenko / iStock via Getty Images Plus

Scientists Aren't Sure Why Our Eyes Move Rapidly During Sleep. A New Study Offers a Novel Theory

Bloody Mary: Why We Think We See Ghosts in Mirrors

iStock

Bloody Mary: Why We Think We See Ghosts in Mirrors

Can You Spot the Ghost Lurking in These Hidden Image Puzzles?

Scroll down for the full images.

Can You Spot the Ghost Lurking in These Hidden Image Puzzles?

The Science Behind Our Pumpkin Spice Obsession

Rimma_Bondarenko/iStock via Getty Images

The Science Behind Our Pumpkin Spice Obsession

Watch—and Listen—to a Tortoise Snacking on Veggies in Adorable ASMR Video

Mark Kolbe/Getty Images

The Reason Coffee Makes Some People Sleepy

"Why isn't this working?"

Watch an Orange Square Appear to Change Colors in This Optical Illusion Video

This background is basically an invitation for your brain to play tricks on you.

What Is the Mandela Effect?

Media24/Gallo Images/Getty Images

10 Uncanny Examples of the Mandela Effect

The Mona Lisa, by Leonardo da Vinci

Why Do We Love to Squeeze Cute Things?

whyframestudio/iStock via Getty Images

The Difference Between Dementia and Alzheimer's, Explained

Dementia and Alzheimer's have different meanings.

Can You Spot the Three Olympic Medals Hiding In the Cryptocurrency?

Mike Rogalski / Eyewash

The Reason Reading Makes You Sleepy

The book didn't stand a chance.

Could a Zombie Survive On a Diet of Human Brains?

Mmmmm ... brains!

When Your Mom Mistakenly Calls You By Your Sibling’s Name, It’s Because She Loves You

"You know I know your names, right?"

6 Scientific Reasons You Should Be Reading More

Reading has some surprising benefits.