The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
A ball of glass will bounce higher than a ball made of rubber.
73
Oak trees produce 2,200 acorns in a season, but each acorn only has a 1 in 10,000 chance of becoming an oak tree.
304
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
Out of all the senses, smell is most closely linked to memory.
146