I don’t know, you go two months without a single question and then three come along at once. Anyway, Glory Be To Smurf, For He Is Awesome asks
So I was watching a program that said we’d dammed so many rivers that it had altered the spin of the earth by a fraction of a second. That got me thinking, firstly on how the hell that made a difference and secondly if there was anything humanity could do to really alter the spin of the earth?