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.

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

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

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

Once I knew only darkness and stillness... my life was without past or future... but a little word from the fingers of another fell into my hand that clutched at emptiness, and my heart leaped to the rapture of living.

The theory behind the paper is that actual chewing stimulates a neuronal and hormonal reflex that helps to awaken the gut. Certainly, there's a great deal of appeal to that theory.