The Earth faces seven "tipping points" within the next 100 years. These are changes in the environment that can't be undone, and which will lead to a disastrous downward spiral and amplify global warming and environmental damage on a historic scale. The first of these, the collapse of the Indian summer monsoon, will happen within just one year, predict scientists. The next one, the melting of the Arctic sea-ice, will happen within 10 years. [UniverseToday, via PosthumanBlues]