In 2006 NASA scientists discovered a strange noise in deep space that was several times louder than anything they would expect. To this day they do not know what it was and it has been dubbed the "Space Roar."

In 2006 NASA scientists discovered a strange noise in deep space that was several times louder than anything they would expect. To this day they do not know what it was and it has been dubbed the "Space Roar."

Next