Mass extinction event 35 million years ago

The dramatic shift to colder and drier climates likely resulted in rapidly changing Australian habitats, which hugely impacted the animals that inhabited them. ANU biologists have found the first evidence of mass extinction of Australian animals caused by a dramatic drop in global temperatures 35 million years ago. This period of intense and rapid climate change occurred at the same time when Australia separated from Antarctica. Lead researcher ANU PhD student Ian Brennan said the team detected the mass extinction of pygopodoid geckos by using molecular evolutionary methods to examine fossil records. "The dramatic shift to colder and drier climates likely resulted in rapidly changing Australian habitats, which hugely impacted the animals that inhabited them," said Mr Brennan from the ANU Research School of Biology. "Our research provides evidence that rapid shifts in climate may have profound and long-lasting effects on global biodiversity." Mr Brennan said findings also suggested the emergence and spread of deserts in Australia from about 10 million years ago provided ideal habitat for new pygopodoid gecko species to prosper. "Our findings suggest that arid regions of Australia have acted as a cradle for geckos, promoting the rich gecko diversity that is found across the continent," he said.