In this episode head back 30 million years to visit the John Day Formation in Oregon, USA.

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Organisms encountered in this episode include:

Metasequoia, Polypodium, Pinus johndilyensis, Rubus, Platanus, hypertragulidae, Hydrangia, Ulmus, Fraxinus, Fagus pacifica, Toxicodendron wolfei, Quercus consimilis, Protosciurus rachelae, Vitis, Nuphar, Equisetum, Nimravid, Betula angustifolia, Alnus, Menispermum, Cornus, Paleocastor, Miohippus, Temnocyon, Terminalia, Acer, Tilia, Ceridiphyllum crenatum, Carya, Florissantia speirii, Eporeodon occidentalis, Crataegus merrinmii, Decodon brownii, Fothergilla speirii, Phytocrene, Hovenia, Daeodon humerosum.

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The world in the Oligocene 30 million years ago. (Paleoatlas project, Chris Scotese).