Truth (or at least data) comes to those who seek. A short google later: http://upload.wikimedia.org/wikipedia/commons/f/f5/All_palaeotemps.png http://upload.wi

Truth (or at least data) comes to those who seek. A short google later: http://upload.wikimedia.org/wikipedia/commons/f/f5/All_palaeotemps.png http://upload.wikimedia.org/wikipedia/commons/f/f5/All_palae... It's worth pointing out that if you go too far back in the past, the data is actually meaningless. 5 billion years ago, when it was still being formed, I'm sure the Earth was a lot hotter than it is now - but that doesn't mean we wanna go back there. The real questions are: 1) Is the climate changing? (very probably) 2) Could the changes cause great disruption, war, famine, loss of life, etc? (probably) 3) Is that climate change induced by us? (maybe, or "probably" depending on who you listen to) 4) Can we do something about it?