Study: Earth was warmer in Roman, Medieval times

If you think the Earth is hot now, try wearing plate armor in the Middle Ages.
A Swedish study found that the planet was warmer in ancient Roman times and the Middle Ages than today, challenging the mainstream idea that man-made greenhouse gas emissions are the main drivers of global warming.

The study, by scientist Leif Kullman, analyzed 455 “radiocarbon-dated mega-fossils” in the Scandes mountains and found that tree lines for different species of trees were higher during the Roman and Medieval times than they are today. Not only that, but the temperatures were higher as well.

Read more: http://dailycaller.com/2013/12/13/study-earth-was-warmer-in-roman-medieval-times/#ixzz2nk6IMQL2