Mental Floss

HEALTH

Love your liver.

Not only is the liver your largest internal organ; it is in charge of hundreds of bodily processes ranging from fighting infection to manufacturing proteins and hormones to helping your blood clot.

Jordan Rosenfeld




Free-range chickens.

Bird flu is one of the reasons egg prices have skyrocketed. Here’s what else you should know about the current outbreak of the H5N1 virus among U.S. poultry and dairy cows.

Nick Keppler




The pineal gland is located in the center of the brain.

René Descartes once described the pineal gland as “the principal seat of the soul.” Medical knowledge has vastly progressed since his time, though. Here’s what we know about this critical organ.

Jordan Rosenfeld
A doctor checks a young girl for swollen tonsils.

You might think they’re unnecessary, because so many people have had their tonsils removed—but tonsils actually serve an important role in your immune system.

Jordan Rosenfeld


We’ve all been there.

Whether you’re at a hotel on a business trip or crashing at a relative’s house for the holidays, getting quality sleep on the first few nights can be a challenge. Here’s why.

Kate Horowitz




The caduceus is used as a medical logo, but that’s not its original meaning.

This ancient symbol, also called the Staff of Hermes, depicts two snakes intertwining around a stick that is capped by wings. It’s used as a medical logo, but for almost all its roughly 5000-year history, the caduceus had nothing to do with medicine. 

Nick Keppler


Foot pain and sprained ankles are just a few of the common problems affecting our ill-adapted feet.

From back injuries to difficult childbirth, here are six annoying parts of being human that you can blame on evolution.

Megan Gannon








Nitrous oxide (also known as laughing gas) is a common anesthetic that only requires a mask over the mouth and nose.

Anesthesia is a complex mixture of medications that lessen pain during procedures. Different types affect the body in different ways.

CaLea Johnson