Yawning is so contagious that it can spread to dogs and monkeys.
In 1967, a student sent John Lennon a letter telling him his teacher was conducting a class analyzing the Beatles' songs.
© Bettmann/CORBIS??In the early 1940s, the United States Army was testing the idea of parachuting from planes as a way of deploying troops.
Today's mentalfloss.com Brain Game offers a new Tuesday Test Time challenge that'll have you looking up (or thinking up, anyway). Hopefully, the air's not too thin.
The 13 Most Useless Majors.
It can be a challenge to get insects to look like majestic, beautiful creatures given how much most humans can't stand anything with six legs, but as previously featured photographers Ondrej Paka
It seems like every day you hear a new story about cyber-bullying, phishing or a new computer virus. But when good people get together on the web, it’s amazing what they can achieve.
Adam's apple photo via ShutterstockTouch your fingers to the front of your throat and start humming. Feel around until you can feel vibration directly under your fingers.
Last month we introduced you to nine real people whose pictures have become famous on the internet. Now meet eight more!
1. Ridiculously Photogenic
In 2000, Daniel Suelo opted out of the cash economy. For the past dozen years, he hasn't used money, hasn't paid taxes, and hasn't used government financial assistance services.
It took 70 years, but scientists have finally discovered how an injured fish notifies his peers when he is hurt, giving them the signal to bolt.
With only four cuts, you can turn any apple into a cool (albeit nerdy) puzzle.
Have at it with a brand-new Monday Math Square to jump-start this week's quintet of mentalfloss.com Brain Games.
A new poll of America's favorite cities shows the Pacific Northwest has a great reputation, with cities #one and #two.
Since last week marked the anniversary of the sinking of the Titanic, the legendary ship has been mentioned almost everywhere. Then again, it never seems to fade far from memory.
Image Credit: Sylvie Beland/NASA
Today is Earth Day, the internationally designated time to pay extra-special attention to human impact on Earth’s ecology.