Wearing headphones for just an hour could increase the bacteria in your ear by 700 times.

A lightning bolt is five times hotter than the surface of the Sun.

Human teeth are the only part of the body that cannot heal themselves

Glitter may have originated on a ranch

"Dreamt" is the only English word that ends in the letters "mt".

The biggest butterfly in the world has a 31cm wingspan.

The Earth Isn't a Perfect Sphere

The national animal of Scotland is the unicorn.

Maine is the nearest U.S. state to Africa.

Cherophobia is the Fear of Fun

The "sixth sick sheik's sixth sheep's sick" is believed to be the toughest tongue twister in the English language.

Astronauts' height can change in space due to the absence of gravity.

The U.S. government saved every public tweet from 2006 through 2017

The circulatory system is more than 60,000 miles long

The shortest war in history was between Britain and Zanzibar on August 27, 1896, lasting only 38 minutes.

The word "nerd" was first coined by Dr. Seuss in his book "If I Ran the Zoo."

Only a quarter of the Sahara Desert is sandy

Avocados were named after reproductive organs

Nikola Tesla hated pearls

The world's smallest desert is in the Antarctic, spanning only 1,000 square miles.

Pigs can't look up into the sky