A cautionary tale in evolutionary theory is coming straight from the horse’s mouth. When ancient horses diversified into new species, those bursts of evolution weren’t accompanied by drastic ...

Its ancestral tree sprouted numerous branches. Many of these led to species that no longer exist. In other words, horse evolution was never as straightforward as Marsh's smooth fossil sequence ...

The mammal, which likely weighed 45 to 75 pounds, probably occupied a branch of the evolutionary tree right beside a broad group that has since radiated out into the modern rhinoceros, horse and ...

an evolutionary geneticist at the University of Copenhagen. That's because the oldest previously sequenced genome was about 10 times younger than the horse's. But the scientists pressed on ...