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Which Animal Had The First Skeleton? Was it Even An ‘Animal’? GEO GIRL

Many animals, like ourselves, have skeletons. But what animal built the first skeleton? Was it even an animal? Maybe the question should be what organism built the first skeleton? And why? What drove the evolution of skeletons? In this video, I go through the major animal & organism groups that have skeletons, the types of skeletons they have, and when they may have evolved. There is still a lot for us to learn about the timing of skeleton evolution, but I hope you enjoy this summary of what we’ve learned so far! ;) 0:00 Endo- vs Exo-Skeletons 2:19 What Skeletons are Made of 4:28 First Vertebrate Skeletons? 7:40 First Invertebrate Skeletons? 9:23 First Microbial Skeletons? 10:02 Precambrian Skeletons? 12:41 Ediacaran Biota not all soft 14:06 Reasons for Timing of Skeleton Explosion 15:37 Predators & Skeletons (Which Came First?) 19:30 Potential Super Early Skeletons? 23:13 Skeleton Timeline Summary References: Knoll, 2003: https://doi.org/10.2113/0540329 Donoghue & Sansom, 2002- https://doi.org/10.1002/jemt.10217 Vermeij, 1989: https://doi.org/10.2307/3514748 Murdock, 2020: https://doi.org/10.1111/brv.12614 Wood, 2011: http://dx.doi.org/10.1016/j.earscirev... Naleway, 2016: http://dx.doi.org/10.1016/j.msec.2015... Runnegar, 1989: https://doi.org/10.1007/978-1-4757-61... GEO GIRL Website: https://www.geogirlscience.com/ (visit my website to see all my courses, shop merch, learn more about me, & donate to support the channel if you'd like!) Hey there, Earth enthusiast! Check my favorite Earth-friendly products: Bamboo toilet paper: https://shrsl.com/3cvku Bamboo paper towels: https://shrsl.com/3cvkw Compostable tableware: https://shrsl.com/3cvkz Compostable trash bags: https://shrsl.com/3cvl0 Bamboo cutlery + straw! : https://shrsl.com/3cwfl Eco-Friendly Tote (great for grocery shopping!): https://shrsl.com/3cwfp Reusable straws + cleaning brushes (my fav!): https://shrsl.com/3cwft Eco-friendly laundry detergent: https://shrsl.com/3cwgo Directly offset your carbon footprint with Wren: https://shrsl.com/3d0t2 (Just click link, press get started, take the free C footprint quiz, then choose how much you want to reduce your footprint by donating to the C sequestration projects they're funding!) Non-textbook books I recommend: Oxygen by D. Canfield: https://amzn.to/3gffbCL Brief history of Earth by A. Knoll: https://amzn.to/3w3hC1I Life on young planet by A. Knoll: https://amzn.to/2RBMpny Some assembly required by N. Shubin: https://amzn.to/3w1Ezm2 Your inner fish by N. Shubin: https://amzn.to/3cpw3Wb Oxygen by N. Lane: https://amzn.to/3z4FgwZ Alien Oceans by K. Hand: https://amzn.to/3clMx1l Life's Engines: https://amzn.to/3w1Nhke Tools I use as a geologist/teacher/student: Geology field notebook: https://amzn.to/3lb6dJf Geology rock hammer: https://amzn.to/3DZw8MA Geological compass: https://amzn.to/3hfbdLu Geological hand lens: https://amzn.to/3jXysM5 Camera: https://amzn.to/3l6fGRT Carbon-neutral pencil bag: https://shrsl.com/3cvjv Carbon-neutral backpack: https://shrsl.com/3cvkc Disclaimer: Links included in this description might be affiliate links. If you purchase a product or service with the links that I provide I may receive a small commission, but there is no additional charge to you! Thank you for supporting my channel so I can continue to provide you with free content each week! And as always, let me know your topic suggestions in the comments down below!