There is no such thing as a "sabre-toothed tiger". The correct name for these beasts is sabre-toothed cats, and there have been many different species. The largest, at over 300 kilograms, is this one - Smilodon, which means "knife tooth". Originally from North America, they came to South America two million years ago. The balance of life here changed as they took over the role of top predators.
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