William Henry Harrison, America’s 9th President, was born this week in 1773. Harrison probably would not be pleased to learn his greatest legacy: establishing the system for presidential succession, by dying in office. The Constitution has surprisingly unclear terms about succession, so when Harrison died in 1841, no one knew if the Vice President would

This past Sunday, the U.S. and Canada celebrated Groundhog Day (along with the Super Bowl). According to legend, if a groundhog sees its shadow on February 2nd, after emerging from its burrow, winter will continue for six more weeks. If the groundhog sees no shadow, spring will arrive early. So Groundhog Day involves a reversal