Iron weighs more after it rusts.
68
One ragweed plant can release as many as one billion grains of pollen!
51
Out of all the senses, smell is most closely linked to memory.
146
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
There are more than 270 people cryogenically frozen in the hope that one day the technology will exist that can revive them and extend their lives.
13
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
According to studies, men change their minds two to three times more often than women.
72