Killer Asteroids: Can We Track Them?

If an asteroid the size of an 18-wheeler collided with Earth it would cause massive destruction. And since there are a lot of these, can we at least keep an eye on where they are? Not very well.

Italian Astronaut Captain Samantha Cristoforetti

ISS Astronaut Captain Samantha Cristoforetti is one of the first women fighter pilots in the Italian Air Force, logging over 500 flight hours on six types of aircraft. She’s also a big SF fan!