Nearly 50% of the world's scientists are assigned to military projects.
71
Scientists are learning from the 1700-year-old Lycurgus Cup, which changes colour thanks to nano particles.
0
The bark of an older redwood tree is fireproof.
65
Sound travels about 4 times faster in water than in air.
408
Scientists in Germany have developed a candy that doesn't cause cavities.
11
Neanderthal man had a brain capacity 100cc larger than modern man's.
50
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
Iron weighs more after it rusts.
16