So, 2007 has come and gone and we're on to bigger and better things in 2008. I wonder what we're all in store for this year as far as the environment and new discoveries are concerned? Looking back at last year there were all kinds of environmental and planetary revelations, with most of them decidedly not on the positive side and many of them representing big concerns in the scheme of the world. From climate change and extreme weather conditions to endangered animal species and melting ice caps, 2007 was a year of serious discoveries. Here are 10 of the biggest environmental revelations of last year:
Gallery: 10 earth science revelations of 2007