A Geologist in California Found Something Strange Sticking Out of a Creek. A Reverse Image Search Told Her It Was an Ancient Mastodon Tooth https://www.smithsonianmag.com/smart-news/a-geologist-in-california-found-something-strange-sticking-out-of-a-creek-reverse-image-search-told-her-it-was-an-ancient-mastodon-tooth-180989504/?utm_source=flipboard&utm_medium=activitypub Posted into Smartnews @smartnews-Smithsonianmag