Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Scientists aren't sure what color dinosaurs were.
312
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
304
Scientists have developed a microparticle filled with oxygen that can be injected into the blood stream, enabling us to live without breathing.
21