In 2017, Dr. Isaiah Nengo announced the discovery of a 13 million-year-old fossil ape found in Kenya. This remarkable fossil, nicknamed Alesi, was from a time period where there’s a big blank spot in the fossil record of our family tree. Alesi tells us something new about the early evolution of apes and shows what the common ancestor of humans and all the other living apes might have looked like. In this episode, Dr. Nengo tells the story behind the discovery. This episode was originally released in 2017. We're revisiting it now because Isaiah Nengo will be featured on our new web series, Lunch Break Science, on December 3 at 11 am Pacific. He will share updates on his research and exclusive footage of his recent field work in the Turkana Basin. Visit leakeyfoundation.org/live and sign up to receive event reminders. Special thanks to Isaiah Nengo of Stony Brook University and the Turkana Basin Institute, and Ellen Miller of Wake Forest University. The Leakey Foundation Origin Stories is a project of The Leakey Foundation, a nonprofit organization dedicated to funding human origins research and outreach. Support this show and the science we talk about with a tax-deductible donation. Links Click here to see photos of the discovery, along with a 3D animation of the inside of the fossil. New 13 million-year-old infant fossil ape skull sheds light on ape evolution Questions and answers about Alesi Skull secrets of an ancient ape Research article in Nature: New infant cranium from the African Miocene sheds light on ape evolution Credits Produced by: Meredith Johnson and Shuka Kalantari Editor: Julia Barton Sound Design: Katie McMurran Theme Music: Henry Nagle Intern: Yuka Oiwa Additional Music: Tech Toys by Lee Rosevere Can you give us a 5-star rating? If you like the show, please leave us a review or rating on Apple Podcasts. It's the best way to help other people find the show and we really appreciate it.