The chainsaw was originally invented to assist in childbirth - specifically, to cut through the pelvic bone during obstructed labour.

It is estimated that there are over 3 million undiscovered shipwrecks in the world's oceans.

A recent study found that the risk of peanut allergies drops by 77% if peanuts are introduced into a baby's diet between 5 and 6 months of age.

The Three Gorges Dam in China is so massive it slowed Earth's rotation, making each day about 0.06 microseconds longer — shifting trillions of kilograms of water changed Earth's mass distribution and caused it to spin slightly slower.

While the human brain makes up only 2% of total body weight, it consumes 20% of the oxygen we breathe and 20% of the energy we use.

The electric chair and cotton candy were both invented by dentists - Dr. Albert Southwick and Dr. William Morrison, respectively.

'Bloodcurdling' is more than just a phrase. Studies have shown that watching horror films can raise levels of a blood-clotting protein in your body.