The other day, my daughter complained that her 89.5 average in history class left her short of an A for the grading period. As a teacher mom, I couldn’t help but probe further. I asked her to describe ...

Dolphins are known for what appear to be big, contagious smiles. But do they actually, well, smile? The answer, according to a new study of dolphin play, is a resounding “maybe.” Dolphins use their ...