There are around 60,000 miles of blood vessels in the human body. If you took them all out and laid them end to end, they’d stretch around the world more than twice.
In 1567, the man said to have the longest beard in the world died after he tripped over his beard running away from a fire.
Donkeys and dolphins are sometimes used as guard animals.
A Nepalese doctor has restored the sight of over 100,000 often poverty-stricken people in the last thirty years across Asia and Africa using a 5 minute procedure and an inexpensive artificial lens.