Indoor pollution is 10 times more toxic than outdoor pollution.
62
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
One 75-watt bulb gives more light than three 25-watt bulbs.
57
The smell of freshly cut grass is actually a plant distress call.
31
In the 60s, a scientist gave LSD to dolphins in an attempt to teach them English.
17
Dr.Jonas Salk, the man who came up with the cure for polio, didn’t patent the drug. This made the drug more affordable to the general public, and he lost out an an estimated $7 billion dollars for himself.
41
A 'jiffy' is an actual unit of time for 1/100th of a second!
66
A cubic yard of air weighs about 2 pounds at sea level.
31