This might be the best article you've ever read on the subject.
The answer might actually help us treat some neurological diseases.
The biology of having just one more slice of pie
Sure, boss, I'll get—*yawn*—right to it.
What do ghosts and yawns have in common? They remain scientific enigmas.
Susceptibility seems to decrease with age.
The new book Fire in the Sea brings one eccentric marine biologist's paintings out of obscurity.
And the sensitivity to contagious yawns develops as they mature, as it does in humans.
Dogs catch yawns from humans, but not if they're too young. To perform this study, scientists cuddled with puppies all day.
A new book explores why our bodies do the things they do
PopSci is attending the 40th annual National Symposium on Bat Research
Thought to be an anglerfish, its two forward-facing eyes are a first for the fish world
A global YouTube outage is traced to a single country's censoring attempt
Green cars galore! The U.K.'s largest auto show debuts a slew of sexy new fuel-sippers
Science headlines in 2004
Two angles on the world's most dangerous high-altitude, high-tech daredevil stunt.
It's OK to be bad at the super-popular new video game.
The new batch continues the trend of inclusivity.
Your canine pal probably won't have a job at your local hospital
Only $35 million to ride 1970s technology into orbit
Don't fret, fellas: PopSci's most fashionable nerd shares her picks for ensuring a happy Valentine's Day