but the discovery of a half mammal, half reptile's skull in eastern Utah has huge implications for geologic timelines. The skull of the new species, Cifelliodon wahkarmoosuch, came from a snout ...

For the first time in over 60 years, a rare egg-laying mammal has been spotted by scientists ... with a creature of Greek mythology that is half human, half serpent,” University of Oxford ...

By Carl Zimmer It’s been about 250 million years since reptile-like animals evolved into ... Ultima could easily become too hot for any mammal to survive. They might disappear in a mass extinction.