We can both prevent asteroid impacts and address climate change. It's not either-or.

I am interested in climate change and other topics too. But this thing is so huge, in the worst case we are talking about the end of our civilization.

This whole issue of limits to growth, which provides a psychological, as well as a physical, cap on potential expansion of activity and awareness, has had a very depressing effect on many people.... I don't for a moment think that there's any concept which anyone's working with now which will be followed as a straightforward scenario. But the idea embodied in concepts such as space colonization or space industrialization, or availability of nonterrestrial resources, is fundamental, and it will change the way in which people look at the future.

We not only need to train people, we also need to develop deflection technologies.

While we didn't know the dinosaurs personally, we do know that they were wiped out by an asteroid impact.

By preventing dangerous asteroid strikes, we can save millions of people, or even our entire species. And, as human beings, we can take responsibility for preserving this amazing evolutionary experiment of which we and all life on Earth are a part.

Journalists often put things into either-or scenarios.