Ad Astra: To the Stars! If you love thinking about space, you'll love this extended interview with Planetary Radio host Mat Kaplan. Spirit, Opportunity, Curiosity - what do all those things have in common? They're all hanging out on Mars... with the MARSDIALS! But first - we need your help! We've teamed up with some great other kids podcasts to form Kids Listen. Our first project is a survey for parents of kids who listen to podcasts - please, please, please check it out! Head over to kidslisten.org for more information.