There are glasses which allow a red-green color-blind person to see colors the way everyone else does.
22
After age 30, the brain shrinks a quarter of a percent (0.25%) in mass each year.
139
Each nostril of a human being register smell in a different way. Smells that are made from the right nostril are more pleasant than the left.
38
Only 1 person in 2 billion will live to be 116.
49
The average human body contains enough iron to make a small nail.
50
