We're quite confident we're on the right track.

Asteroids may be less dangerous than they've been made out to be.

These single-celled organisms are extremely sensitive to environmental changes.

Dinosaurs are very popular, and the asteroid theory is sexy, it's a perfect story, and in the past few years it's all you've read in the popular press.

I'm not intimidated because I think I'm right, and someone has to do this,

We cannot freely and wisely choose the right way for ourselves unless we know both good and evil.