Neil deGrasse Tyson @neiltyson
@sometrader78 @jhutch913 @MarkRap40434853 If it’s a flat (horizontal) table and the marbles are placed in the middle, then the they will roll no more than one half a rotation (left or right), from a mass imbalance within them. So, seems to me, the existence of the rail is irrelevant. — PolitiTweet.org
