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Saltwater crocodile. Everything else on this list kills with chemistry. Venom. Toxins. Neurotoxins. This one kills with physics. Six metres. Over a thousand kilograms. A jaw force of 16,000 newtons — the strongest bite ever recorded on any living animal. And it's been doing this for 200 million years. It doesn't need to evolve. It was already perfect. The saltwater croc patrols the rivers and estuaries of northern Australia. It slides into the water with almost no surface disturbance. It submerg