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
One third of the electricity produced on earth is used to power electric light bulbs!
75
The average temperature at 40,000 feet above sea level is -60 F.
56
Scientists are now able to grow 'beating' heart tissue in a lab!
162
One barrel of petroleum holds 42 gallons.
20
One 75-watt bulb gives more light than three 25-watt bulbs.
57
One cubic foot of gold weighs more than 1,200 pounds!
78