Gravity, in the literal sense, keeps everyone (and everything) on Earth grounded. It acts as the anchor that prevents objects from floating skyward. For humans, it’s a leash that stops us from ...

Billions of years ago, Earth was an uninhabitable rock covered in magma. Scientists are still working to decipher the tale of how it transformed into a blue and green orb teeming with life. However, ...

(via TEDEd) There are over 131 million pieces of debris currently whipping around the planet. They range in size from a grain of sand to the size of an entire bus. These orbital debris pose a serious ...