Think “poinsettia” and you think “Christmas,” right? Well, think again. At the time of the first Christmas, the closest poinsettia to the little town of Bethlehem was 8,000 miles away, clinging to ...

At a glance, the fall of the Aztec empire in the early 16th century seems like one of history’s clearest before-and-after moments: a powerful empire crushed almost instantly by a handful of Spanish ...