Of course there's a day for everything. Many days on the calendar, in fact, are used to celebrate more than one "milestone." But I must admit my dismay when I found out that April 15 not only is Tax ...

A pencil eraser (Alexis Madrigal). It's true, as Arthur C. Clarke said, that the most advanced technologies are indistinguishable from magic. It's not true, however, that the world's most magical ...