One ragweed plant can release as many as one billion grains of pollen!
51
Iron weighs more after it rusts.
16
A cesium atom in an atomic clock beats over nine billion times a second.
43
Aluminum used to be more valuable than gold!
84
Hot water can freeze faster than cold water.
181
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
116