We need early warning systems, technologies to deflect an asteroid - and we need political preparedness as well. It needs to be clear who is to decide what, who launches the rockets, who presents which bills to its citizens. This is a planetary decision. We need to do this all together. Or it will not happen.

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.

You see the Earth as a bright blue and white Christmas tree ornament in the black sky. It's so small and so fragile - you realize that on that small spot is everything that means everything to you; all of history and art and death and birth and love.

Anytime we can save lives or prevent the destruction of property, we should do it.

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

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

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.