Research indicates that plants grow healthier when they are stroked.
173
Liquid TIDE laundry detergent glows under a blacklight.
96
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
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
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
Iron weighs more after it rusts.
68
4.5 pounds of sunlight strike the Earth each day.
27
