Our common ancestry with whales, horses, lions, mice, shrews, and other mammals began a long time ago. A meteor may have removed those pesky dinosaurs 65 million years ago and given our ancestors a chance to thrive. Our family has branched out quite a bit since then, although we mammals all still share many similarities. As a result, for example, we hear the world differently than our even older non-mammalian ancestors. Please join us as Dr. Todd Jackman introduces us to our family and our many resemblances. (But do we have to invite the naked mole rats to the family reunion?)