If you hold farts in during the day, they'll just come out when you sleep.
16
If you are cold you are more likely to be hungry because you use energy to keep warm.
144
The focusing muscles of the eyes move around 100,000 times a day. To give your leg muscles the same workout, you would need to walk 80km (50 miles) every day.
21
Your thumb is about the same size as your nose.
124
In 1996, research found that having excessive body hair is linked to higher intelligence.
23
Your heart will pump about 212 million liters in its lifetime.
26
Blue eyes are a genetic mutation. Before the mutation occured, all humans had brown eyes.
89
In ancient Egypt, priests plucked EVERY hair from their bodies, including their eyebrows and eyelashes.
130