unexplained phenomena Laser-cut by giants? How did this massive rock in the Saudi Arabian desert get split so cleanly? Mark Frauenfelder
Science How long would it take for a human brain to form in a void, complete with a memory of having existed? Mark Frauenfelder
art Three Rocks: Bill Griffith's incredible exploration of Ernie Bushmiller's comic strip "Nancy" Ruben Bolling