When dragonflies mate, their tails form a love heart.
22
When cats are happy, they may squeeze their eyes shut.
10
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
Dolphins have names for one another.
18
Ten seconds of hugging a day increases levels of oxytocin, which can reduce blood pressure, thus cutting the risk of heart disease.
26