Some researchers did an exhaustive DNA analysis of the 37 modern cat species, and were able to generate a family tree that includes these species plus the species in the fossil record. In addition, they were able to determine the sequence of migrations (for example, from Asia to North America) that led to the various species we now have. I think they used mitochondrial DNA, which has a well-known mutation rate.
One interesting observation is that the cheetah originated in North America and migrated to Asia some millions of years ago. It has long been speculated that there had been a really fast, unknown predator in North America that would explain why the pronghorn is so fast (it's got cheetah - 60mph - speed, and incredible endurance). It's so much faster than anything around today, that evolution "predicted" the prior existence of a fast predator that caused a selection of a fast prey animal.
Kinda neat, if you buy into these things.
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"Go yell at an M&M"
One interesting observation is that the cheetah originated in North America and migrated to Asia some millions of years ago. It has long been speculated that there had been a really fast, unknown predator in North America that would explain why the pronghorn is so fast (it's got cheetah - 60mph - speed, and incredible endurance). It's so much faster than anything around today, that evolution "predicted" the prior existence of a fast predator that caused a selection of a fast prey animal.
Kinda neat, if you buy into these things.
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"Go yell at an M&M"