North and South America were teeming with large mammals before humans came to this hemisphere 10-20kya. Saber-tooth cats, horses, ground sloths, enormous camels

North and South America were teeming with large mammals before humans came to this hemisphere 10-20kya. Saber-tooth cats, horses, ground sloths, enormous camels, mammoths, mastodons, .... https://en.wikipedia.org/wiki/List_of_North_American_animals_extinct_in_the_Holocene https://en.wikipedia.org/wiki/List_of_North_American_animals... https://en.wikipedia.org/wiki/List_of_South_American_animals_extinct_in_the_Holocene https://en.wikipedia.org/wiki/List_of_South_American_animals...