The analysis suggests that there was a mass extinction event at the time of the end-Permian, on land - and that it happened at the same time as the marine end-Permian extinction.
Evidence shows Native Americans in New England lived lightly on the land for thousands of years. It wasn't until Europeans arrived that the landscape experienced major human impacts.
Did you recently hear news that Earth's oldest pigments were hot pink? That's not quite right. When they were in living bacteria a billion years ago, they were performing photosynthesis – and green.