Dinosaurs only had tooth enamel 10-20% as thick as humans'. So why didn't Tyrannosaurus Rex look like a gummy old man? Answer: dinosaurs had iron teeth. https://t.co/VTm4BjGvYr
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RT @Kyukimasa: コモドオオトカゲの歯は鉄で補強されている https://t.co/ArBaHLUkJl エッジ部分のエナメル質に鉄を多く含まれていて獲物の肉を引き裂く強度を高めているのだそうだ
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RT @NatureJapan: A. LeBlancらの鉄に覆われた #コモドオオトカゲ の歯に関するNature Ecology & Evolution @NatureEcoEvo #論文 Iron-coated Komodo dragon teeth and the co…