New Horizons Principal Investigator, Johns Hopkins University Applied Physics Laboratory
We talk with astronomer Reta Beebe. She was a colleague and friend of Pluto's discoverer, Clyde Tombaugh. Principal investigator Alan Stern provides a status report on the New Horizons mission to Pluto. Emily Lakdawalla is listening to Mars in this week's Q&A segment, and Bruce Betts returns with a new space trivia question in What's Up! Space headlines, too.