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
An unprotected human can survive up to 1.5 minutes in space with no permanent bodily damage.
82
If you have 1 billion dollars and spend $1,000 every day, it would take you 2,740 years to go broke.
31
Scientists at the Zhejiang University in China have developed an ultra-light material known as carbon aerogel.
3
Your thumb is about the same size as your nose.
124
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