When cats are happy, they may squeeze their eyes shut.
10
Raj from the Big Bang Theory is married to Miss India.
11
Dolphins have names for one another.
18
Kissing releases masses of oxytocin, a "love potion" that helps couples bond and feel more attracted to each other.
13
In 2011, archaeologists discovered the skeletal remains of a Roman couple who have been holding hands for 1,500 years.
81
A puppy is born blind, deaf, and toothless.
16