Scientists are now able to grow 'beating' heart tissue in a lab!
162
One 75-watt bulb gives more light than three 25-watt bulbs.
57
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
Most dust particles in your house are made from dead skin!
67
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Scientists aren't sure what color dinosaurs were.
312
When you walk down a steep hill, the pressure on your knees is equal to three times your body weight.
199