Pumice is the only rock that floats on water.
14
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Scientists have revived a flowering plant from a fruit stored away in permafrost by Arctic ground squirrel 32,000 years ago.
16
Iron weighs more after it rusts.
16
According to studies, men change their minds two to three times more often than women.
72
The sun is 330,330 times larger than the earth.
75
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21