The fluorocarbon particles are pretty small, and you don't want those sitting in your lungs.

The particles are so small they should not last very long. You couldn't have the E ring just sit there for the age of the solar system. It had to be regenerated somehow.

We've got a lot of respect for Portland. We see them as a pretty solid lacrosse team.

The storm's sitting right on top of it, from the Oklahoma border to St. Louis. I-44 is pretty covered right now,

We look at snow temperature and also the moisture content of the snow. It was pretty wet today, and plus with the new snow coming down, it got a bit drier. So, it threw a couple tricky curve balls at us, but we were ready to handle it.

Capturing particles from a comet as it whizzes by is a way of looking back in time.