CNN New Day Sunday November 3, 2013 13:53:00
>> astroids are out there and surely one with our name on it, earth's name and small ones will explode and take out regions and cities maybe a transportation grid. the big ones are rarer, render fractions that are rarer and take out the dinosaurs, you get one every 100 million years or so. other things that can take out life on earth are major climate change. if you're a life form that is adapted to a certain configuration or combination of temperature and atmosphere conditions, then if that changes faster than you can respond, that can be devastating that basically your echo system changes an...
Source: archive.org