Based on my research, which include image composites of two flyby views of Mercury from the MESSENGER spacecraft, I conclude that Mercury has not cooled and shrunken as much as previously thought.

Many older African Americans who grew up in the South painfully remember the time when black passengers had to sit in the back of busses or use separate train compartments; and when train stations and bus terminals provided separate but mostly unequal facilities such as drinking fountains, restrooms, waiting lounges, and eating facilities for black and white passengers.