Many people know that a big asteroid killed of the dinosaurs 65 million years ago, and many people know that similar asteroids are still a threat to Earth. What many people do not know is that they can help spot these killers before it's too late. It is actually very simple, all it requires is a telescope. A person can buy a telescope and actually look for these objects in the sky. Then if they spot one they could spread the word and professional agencies could train their telescopes on the object and potentially save the Earth from a natural disaster. To top this off here is a video by Emily Lakdawalla from The Planetary Society explaining the threat and how to help.
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