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An asteroid that's 45 meters across is headed towards Earth - its impact will unleash 3-5 megatons of energy. Unfortunately the world's governments are so badly-prepared that nobody responds to the danger until it's too late. Now a group called the Panel on Asteroid Threat Mitigation is working with the United Nations to make sure this never comes to pass, and astronaut Rusty Schweickart has just published an interesting article about the work he's doing with the group. More »
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