This optical illusionary animation of oscillating dots illustrates how sound waves travel through the air.

It's been only a week since the application process began for Mars One, but the organizers says they have already received more than 20,000 applications for the one-way mission to the Red Planet.

Illustrated by deviantART user Dryponder.

This spam-tastic in-game message in the iOS game "Super Monster Bros" will gladly take $109.99 from you.