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.

Asteroids have hit the Earth millions of times. We can see them as shooting stars every night. When they get bigger, things get complicated. It is only a matter of time until a big one hits us. And since we can do something about it, we should.

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

It would take an extremely large spacecraft to deflect a large asteroid that would be headed directly for the Earth.

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.

In the short term, some deadly virus might be more important, but in the long run there is hardly anything more important than asteroids.