If you’ve been relying on a Fitbit to track your heart rate at the gym, you might want to take those readings with a grain of salt.

HEALTH
A recent report found health or safety violations in 80 percent of inspected facilities in five states.
The Prophix toothbrush doesn’t just clean your teeth—it records a video inside your mouth as you brush.
Hold that falafel.
These cells are being studied and developed in numerous labs around the world to create human tissue and potentially treat a variety of human diseases and illnesses.
Handstands may seem like a move best left to gymnasts and super-yogis. But really, you don't have to have Olympian genes or spend all your free time in a yoga studio to learn how to do them.
Think twice before making a scene at the pick-up window: They have a naughty list.
Researchers are studying crocodile genes to combat the future of antibiotic resistance.
Engineers have designed transparent, peel-off artificial skin that stretches just like the real stuff.
The best way to get well is staying hydrated and getting plenty of rest. If that’s not proactive enough for you, cold medicine might be able to help.
More than 93,000 physical therapists (PTs) in America treat neurological, movement, and genetic disorders as well as more common issues like headaches and dizziness.
There's a lot more than estrogen and testosterone.
In 1858, the poet published a 13-column guide to manly health under a pseudonym.
The ravages of "phossy jaw"—necrosis of the jaw bone caused by phosphorus poisoning—may have been discovered in a young teenager's remains.
“SSRIs are a good thing, but they have an inhibitory effect on osteoblasts, bone cells, which we’ve only known about since 2010,” Sebastiano Andreana tells mental_floss.
Despite what you may have heard, you’re not doomed to be out of shape if you’re a night owl and can’t bear to work out when you roll out of bed.