The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Pure water (H2O) does not conduct electricity on its own.
46
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
If the chemical sodium is dropped into water it will immediately and violently explode.
67
Your brain is 80% water.
525
Nearly 50% of the world's scientists are assigned to military projects.
71