One barrel of petroleum holds 42 gallons.
20
The brain case [of Neanderthals] on the average was more than 13 percent larger than that of the average of modern man
61
The bark of an older redwood tree is fireproof.
65
Iron weighs more after it rusts.
16
Columbia University has developed an artificial tree that passively soaks up carbon dioxide from the air using "leaves" that are 1,000 times more efficient than true leaves that use photosynthesis.
15
Hot water can freeze faster than cold water.
181
Sound travels fifteen times faster through steel than through air.
134