One ragweed plant can release as many as one billion grains of pollen!
51
Each day is longer than the previous on by 0.00000002 seconds which is 13 seconds each century!
116
0.3% of solar energy from the Sahara is enough to power the whole of Europe.
310
Hot water can freeze faster than cold water.
181
At room temperature, the average air molecule travels at the speed of a rifle bullet.
55
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
Sound travels about 4 times faster in water than in air.
408