It's fascinating that they're so different.

We're seeing a variety of things that we know absolutely come from a comet.

We fully expect some of the comet particles to be older than the sun.

Scientifically, that's great, because there's been lots of discussion of whether comets contain minerals or glass.

It's thrilling. We have samples of a comet from the edge of the solar system.

We opened the capsule yesterday and it's just full of comet dust.