The hair of an adult man or woman can stretch 25 percent of its length without breaking.
116
One barrel of petroleum holds 42 gallons.
20
Forensic scientists can determine a person's sex, age, and race by examining a single strand of hair.
101
Nearly 50% of the world's scientists are assigned to military projects.
71
Optical illusions occur when what the eyes see conflicts with what the brain expects.
75
Oxygen, carbon, hydrogen and nitrogen make up 90% of the human body.
118
Scientists are attempting to create a synthetic brain by reverse-engineering the mammalian brain down to the molecular level. A cellular human brain is predicted possible by 2023. It hopes to shed light on consciousness.
10