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Your Inner Fish by Neil Shubin Chapter 1: Finding Your Inner Fish. Presentation by Adena Feitelson. Really Old Rocks But which ones are the best at preserving bones?. Sedimentary, my dear Watson! (page 10) Limestone, sandstone, siltstone, and shales
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Your Inner Fishby Neil ShubinChapter 1: Finding Your Inner Fish Presentation by Adena Feitelson
Really Old RocksBut which ones are the best at preserving bones? • Sedimentary, my dear Watson! (page 10) • Limestone, sandstone, siltstone, and shales • Formed more gently (usually by water) than metamorphic or volcanic rock Picture from: http://www.cubscoutgeology.com/images/Rock%20Chart%20copy.jpg
Really Old RocksFinding the transition point • No necks 385 million years ago(page 10) • Already land creatures 365 million years ago(page 10) Picture from: http://i.livescience.com/images/060405_fish_transition_02.jpg
Tiktaalik“Large Freshwater Fish” (page 25) Confirms major Paleontological Prediction! Picture from: http://www.evolutionnews.org/tiktaalik2.jpg Half fish: fins and scales (KOSHER!) Half tetrapod: flat head, neck (page 24) and wrist Picture from: http://scienceblogs.com/pharyngula/upload/2006/04/tiktaalik_phylo.jpg Found on Ellesmere Island, July 2004
Our Inner Fish Why is it important? How does it apply to everything the book explains?
Credits • Shubin, Neil. Your Inner Fish: A Journey Into The 3.5-Billion-Year History of the Human Body. New York: Vintage Books, 2009.