A ball of glass will bounce higher than a ball made of rubber.
73
Pure water (H2O) does not conduct electricity on its own.
46
Nearly 50% of the world's scientists are assigned to military projects.
71
Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
21
The earth is approx. 6,588,000,000,000,000,000 tons.
175
It takes a photon 170,000 years to travel from the core of the Sun to the surface, but only 8 minutes to travel the rest of the way to Earth.
6
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Iron weighs more after it rusts.
16