Iron weighs more after it rusts.
68
The bark of an older redwood tree is fireproof.
65
The idea of left brain (logical) and right brain (creative) has no basis in neuroscience and is in fact a myth.
16
The earth is approx. 6,588,000,000,000,000,000 tons.
175
Airports that are at higher altitudes require a longer airstrip due to lower air density.
39
Most dust particles in your house come from dead skin.
48
Sound travels fifteen times faster through steel than through air.
134
Your brain is 80% water.
525