For those not following my twitter feed, I'm going to be taking part in Dr Karl's live science phone-in, tonight, on BBC Radio 5's Up all Night with Rhod Sharp. Our segment is supposed to go out between 2.30 and 3.30 AM although it might shift a bit depending on the running schedule. The program will be available on iplayer for those in the UK.

Dr Karl and I did a couple of radio shows back last year and had a great time. We were in the same studio in Sydney then; now we're a tiny bit further...