New Scientist TV: Born to be Viral: How a ball could sink forever

New Scientist TV: Born to be Viral: How a ball could sink forever: ...it's possible for a sufficiently heavy object to reach a constant speed when flung into a grainy substance - and continue to plummet indefinitely if there's no bottom. In this video, you can see a computer simulation they created of this scenario. Until now, it was assumed that an object quickly loses energy and stops when it plunges into a grainy material.