After eight years as President "I have only two regrets: that I have not shot Henry Clay or hanged John C. Calhoun."--1837--
Andrew Jackson (Calhoun was his Vice-President and Clay a former Secretary of State)
"The spacecraft, which has been circling the comet and monitored by the European Space Agency since August 2014, has suddenly recorded the comet's land surface changing significantly, adding then subtracting mass, then changing again, then changing back.
And it's all gone on within the past six weeks.
Up until then, the site had stayed exactly the same. What's happening?"