S1E8 J17 Mary Anning deep time, geology, Ichthyosaur, Jurassic, m4, Mary Anning, paleontologist Listen Junction 17 of the M4 traveling west. This is the second episode from the Jurassic Period. Audio Playerhttps://www.richardtreves.com/podcast-player/488/s1e8-j17-mary-anning.mp300:0000:0000:00Use Up/Down Arrow keys to increase or decrease volume.