Don Brownlee Billion Quotations

We traveled almost 3 billion miles in space. We visited a comet, grabbed a piece of it, and it landed here this morning. It's an incredible thrill.

We are collecting the actual building blocks the solar system was formed from 4.5 billion years ago. We believe that the particles have a lot of information stored in them.

We believe materials coming out of comets now is the same material that went into comets 4.5 billion years ago.

This is what we looked like 4.5 billion years ago. Comets haven't changed since then.