Iron weighs more after it rusts.
68
Most dust particles in your house are made from dead skin!
67
One barrel of petroleum holds 42 gallons.
20
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
Sound travels fifteen times faster through steel than through air.
134
Diamonds can be shattered with a hammer.
-104
German chemists made a replica of a trophy the size of one molecule.
68