When we saw the huge impacts, we all started laughing and talking excitedly.

We had a long time to come up with all of the things that could go wrong.

We thought we might be able to see grains if they were large enough, but we really didn't know what would happen. They might just disintegrate and explode or pass all the way through.

You'll see a lot of information coming out quickly from these samples.

They are very small rocks, but they are rocks nonetheless. And what do these minerals tell us about how these grains form? We think that much of the Earth's water and organics ... perhaps came from comets. So what will these samples tell us about basically where our atoms and molecules came from and then how they were delivered to Earth and in what amount?

I was 8 years old. We studied wastewater disposal and planets.

Much of the earth's water and organics perhaps came from comets. This can give us a history of organics in the solar system.

We were really worried about that and got more and more worried as time went by. So when we opened the tray just two days ago in the lab, we were pleased to find that everything went exactly right -- just fabulous. We couldn't have done a better job catching these particles.

We are trying to learn more about comets to see what the first materials were like or how water arrived on Earth. It's important because all the atoms in our bodies were formed from the stars.