What right do humans have to interfere with this? If an extinction sized object approached I'd rather not know about it. Let's do something about real problems here on Earth first - like Global Warming, a man-made phenomenon of at least the same magnitude as some rogue asteroid, which probably only happens every 50My or so. If you can get governments to part with good money to work on this, then all power too you, but you have to wonder why any sane politician would fund this. But then I guess it's easier than tackling a real problem. I'd love to hack this system to give false warnings over my enemy's territory and thereby throw them into confusion. What a great idea for a book or movie!

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