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Around 380 million years ago in the Late Devonian, this armored giant reached about 10 meters long and weighed over 4 tons. Its head and thorax were covered by thick bony armor like a living tank. Its jaws had sharp, self-sharpening bony plates (no real teeth) with a bite force between 7,000 and 11,000 Newtons — one of the most powerful for any aquatic predator of that time. It was an ambush predator that struck with explosive speed in shallow murky waters, crushing armored fish, large invertebr
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