One barrel of petroleum holds 42 gallons.
20
Scientists are now able to grow 'beating' heart tissue in a lab!
162
Iron weighs more after it rusts.
68
According to studies, men change their minds two to three times more often than women.
72
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Most liquid laundry detergents are alive with living organisms that help to break down stains!
88
One cubic foot of gold weighs more than 1,200 pounds!
78
