Earth temperature timeline by xkcd
I saw this on the always awesome xkcd (www.xkcd.com) site. It is a timeline showing the average temperature of the Earth from 20,000BC to now. It is brilliantly done and is essentially a superb counter argument to people who argue that the Earth has always warmed up and cooled down. It has, but global temperatures are currently going mental.
Word of warning – if you are a creationist, you won’t like this. Also, you’re an idiot. Same goes for climate change deniers.
In case this doesn’t work or is hard to see in your browser, you can find the original here. The Earth is getting toasty, enjoy.
