A shock wave, far away in space, might be the telltale sign of the first confirmed “runaway” supermassive black hole , escaping its host galaxy at 2.2 million miles per hour (3.6 million km/h). The… [+5514 chars]Read More
Why do bats hang upside down to sleep Livesciencecom
Bats often hang upside down when they sleep instead of sitting right side up or lying down — why?
