Plus, notes Harvard evolutionary biologist Katherine Hinde, babies evolved to cry at night thousands and thousands of years ago when people's sleeping habits weren't like they are today.

Some people mistakenly think cats are nocturnal ... But before you can stop your cat from crying at night, you have to first ...

Unlike nightmares, night terrors are experiences that most ... conditions or psychological problems if they wake up crying. These people may benefit from seeing a sleep specialist.

Other habits, like getting enough sleep, may also help. People often cry at funerals, during sad movies, and when listening to sad songs. But other people may find themselves crying while having ...

Plus, notes Harvard evolutionary biologist Katherine Hinde, babies evolved to cry at night thousands and thousands of years ago when people's sleeping habits weren't like they are today.