Iron weighs more after it rusts.
68
The use of emoticons affects our corresponding brain areas and can actually trigger emotions.
21
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
Scientists aren't sure what color dinosaurs were.
312
One 75-watt bulb gives more light than three 25-watt bulbs.
57
No matter how cold it gets, gasoline will not freeze.
107
One barrel of petroleum holds 42 gallons.
20
Nearly 50% of the world's scientists are assigned to military projects.
71