Iron weighs more after it rusts.
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One cubic foot of gold weighs more than 1,200 pounds!
78
Scientists are now able to grow 'beating' heart tissue in a lab!
162
Sound travels about 4 times faster in water than in air.
408
The most expensive material on the planet is antimatter - worth $62.5 trillion per gram.
18
One third of the electricity produced on earth is used to power electric light bulbs!
75