The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
In 1999, Harvard physicist Lene Hau was able to slow down light to 17 meters per second and in 2001, was able to stop light completely.
39
Pure water (H2O) does not conduct electricity on its own.
46
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Cold water weighs more than hot water.
93
Cellophane is not made of plastic. It is made from a plant fiber, cellulose, which has been shredded and aged.
44
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
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79