That climate change denier that got burned by astrophysicist just came back for seconds...

As we reported yesterday, Twitter was the home of a very entertaining exchange in which an astrophysicist sent a climate change denier to the burn unit after he suggested she should go and learn some 'actual science'.

Many suspected that would be the last Dr Catherine J. Mack, AKA @AstroKatie would ever hear from Gary. Fortunately for us, though, Gary decided to come back for a second helping.

After taking two days to come up with a sufficient comeback, Gary plumped for suggesting that Katie should get a refund as she was severely lacking when it came to the 'most basics of science'

Well, Gary, you can argue with Katie all you want, but a PHD paid for in part by Princeton University is hard to argue with. She knows what she's talking about.