One barrel of petroleum holds 42 gallons.
20
One ragweed plant can release as many as one billion grains of pollen!
51
The bark of an older redwood tree is fireproof.
65
Aluminum used to be more valuable than gold!
84
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Billions of neutrinos pass unnoticed through your body every second.
6
Neanderthal man had a brain capacity 100cc larger than modern man's.
50