Iron weighs more after it rusts.
16
Hot water can freeze faster than cold water.
181
Brass doorknobs automatically disinfect themselves in about 8 hours.
18
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199
A cesium atom in an atomic clock beats over nine billion times a second.
43
The sun is 330,330 times larger than the earth.
75
Scientists in Germany have developed a candy that doesn't cause cavities.
11
The Earth's atmosphere weighs about 5.5 quadrillion tons.
108