Only about 2% of the world population has green eyes.
36
Cows can sleep standing up, but they can only dream lying down.
745
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
No one knows Albert Einstein's last words. Just before he passed, he spoke several words in German, but his nurse only knew English.
154
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