Merry Christmas to all my readers, and even more to my writers. Here is a festive image, tastefully coloured in by me.

And now for the quiz. In the spirit of “5 advances in climate science” I ask for the 5 best mistakes in sci-fi novels of the past year. To get the ball rolling with a low bar (and mix some metaphors in the process) I’ll offer the polar orbiters in Anathem. Things like di-lithium crystals don’t exist don’t count, of course. It has to be something plausible and interesting thats wrong.
[Oh well, that didn't work. Never mind... -W]