There is a bit of hoo-hah in this article.

Many men never shave, but their beards never grow beyond a foot or two because the hair dies and falls out before it continues to grow any longer, replaced by others that start to grow in its place.

The relation to thumb size and penis has never been established either.

Also, your skin account for about 20% of body weight which would be 30 lbs in a typical person, but a brain weights about 7 pounds.

I doubt much of the other so called facts there are trustworthy.