Circle your calendar. April 13th, 2036 could be a really, really bad day on planet Earth.
A group of astronauts and engineers warns that an asteroid may pass uncomfortably close to Earth that day. The chances it will actually hit are just one in 45,000, but even at those odds, the scientists warn, the United Nations should consider a response.
The scientists met this past weekend in San Francisco to discuss the potential threats asteroids pose to the Earth and what can be...Full Story