Pure water (H2O) does not conduct electricity on its own.
46
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Scientists concluded that the chicken came first, not the egg, because the protein which makes the egg shells is only produced by hens.
11
Most dust particles in your house come from dead skin.
48
Because heat expands the metal, the Eiffel Tower always leans away from the sun.
79
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
A single speck of dust is half way in size between a subatomic particle and the Earth.
15
The bark of an older redwood tree is fireproof.
65