My three young daughters like to watch pets doing silly things. Almost daily, they ask to see animal video clips on my phone and are quickly entertained. But once my 7-year-old lets out a belly laugh, ...

Long before modern brain imaging technologies illuminated the neurophysiological mechanisms that make laughter contagious, William James (1842-1910) observed, "We don't laugh because we're happy, ...

Add Yahoo as a preferred source to see more of our stories on Google. (Photo Credit: @towhitneyandbeyond / TikTok) An adorable video of a baby’s reaction to her mom cooking has been capturing hearts ...

Colds and viruses aren’t the only things people “catch” from one another. Behavior can be contagious, too. From moods and ...