Time travel, monster crabs and nanotube blades

Nope, it's not an episode of Dr. Who. These are articles from around the net.

Ret-conning photons


Giant Russian Crabs

Nanotech in Damascus steel

I've actually heard about quantum mechanics experiments with photons that resulted in the photons striking a sensor a few microseconds before they were emitted, I want to say a year or so ago. Wrap your head around that.