How to Find Thousands of Oceanic Fossils in... Ohio?

Modern-day Ohio is more than 600 kilometers from the ocean - yet it has thousands of ocean fossils dating back to the Ordovician, giving us a glimpse at its past under an ancient, fishless sea. Thanks to Friends of Caesar Creek for supporting this episode of SciShow! Go to to plan your next outdoor adventure! Hosted by: Hank Green ---------- Support SciShow by becoming a patron on Patreon: ---------- Huge thanks go to the following Patreon