Sharks are boneless. Their skeletons are made of lightweight cartilage, which rarely fossilizes, so museum displays usually feature only their preserved jaws and teeth.

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.

In 2005, the US Treasury released a $1 coin with free shipping. Some savvy individuals bought large quantities of these coins on their credit cards, then paid off their credit cards with the same $1 coins, effectively earning infinite airline miles.

According to a study, most dogs reach peak cuteness between six and eight weeks old.

Portuguese is the most spoken language in the southern hemisphere, with over 250 million speakers across Brazil, Mozambique, and Angola.