The sabre-tooth cat, Smilodon
ranged over both North and South America. Homotherium had an even
greater distribution, located in Africa, Eurasia, and North America, and of
course the newest sabre-tooth cat,Xenosmilus, has been recently
recovered in North America. Such a wide variety of distribution of the
sabre-tooth cat is a result of landbridges. Landbridges, found in the
Northern hemispere, included the Bering landbridge between Canada and
Siberia, and the Arctic landbridge between Greenland and Scandanavia.
Landbridges betweeen Eurasia and South Africa did not appear until later in
the Tertiary, as did the connection from North America and South America (Condie 1998).
These landbridges are what provided the early
ancestors of the sabre-toothed cat access to various continents, thus
showing why there is such a wide distribution of the sabre-tooth cat.