Eons | PBS Your Place in the Primate Family Tree | Eons WKNO Published February 22, 2024 at 4:00 AM CST Facebook Twitter LinkedIn Email Purgatorius, a kind of mammal called a plesiadapiform, might’ve been one of your earliest ancestors. But how did we get from a mouse-sized creature that looked more like a squirrel than a monkey -- to you, a member of Homo sapiens?