Cats sleep for 70% of their lives.
8
Pumice is the only rock that floats on water.
14
Sifrhippus was a species of horse about the size of an average duck and roamed North America 56 million years ago.
2
Standard paper cannot be folded in half more than 7 times.
232
Iron weighs more after it rusts.
16
It has been calculated that every 2 minutes, we take more pictures than all of humanity in the 19th century.
13
The first webcam was used in 1991 by Cambridge researchers for checking the coffee pot without leaving their desks.
10