Iron weighs more after it rusts.
16
One barrel of petroleum holds 42 gallons.
20
Scientists in Germany have developed a candy that doesn't cause cavities.
11
During photosynthesis, plants emit light humans can’t see, but NASA can see that light from space - and they've even made maps of it!
21
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
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88
Pure water (H2O) does not conduct electricity on its own.
46
The force of a suction cup is calculated using F=AP.
15