Anna heads further up the family tree (as Amber lags behind, gasping), and introduces us to our Australopith and Paranthropus relatives. You can always rely on us for our australo-pithiness: Anna gives us the scoop on Lucy's new neighbor Selam and tells us about why babies have such grabby little hands, while Amber grapples with the prospect of a world before people and realizes she might have met an extinct hominin at a party once.