There's an isolated tribe in Zimbabwe where the people have only two toes, dubbed the 'ostrich people'.
10
If Earth's life was compressed into 1 year, then humans would have been around for only 2 seconds.
15
A person will create enough saliva to fill two average size swimming pools during his lifetime.
191
There are actually seven different types of twins: Identical, Fraternal, Mirror-Image, Polar Body (Half Identical), Mixed Chromosome, Superfecundation, and Superfetation.
20
A study had men report their own penis size, and the average was found to be 6.1-6.5 inches. A subsequent clinical study actually measured penises, and found the average size to be 5.1-5.7 inches.
-3
On average women can hear better than men.
170