One 75-watt bulb gives more light than three 25-watt bulbs.
57
A single cup of gasoline, when ignited, has the same explosive power as five sticks of dynamite.
57
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Nearly 50% of the world's scientists are assigned to military projects.
71
A ball of glass will bounce higher than a ball made of rubber.
73
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