Sentences with phrase «when modern mammals»
In a paper published in the journal Systematic Biology and delivered at the Society for Molecular Biology and Evolution Conference this week, Dr Phillips said biases in models of DNA evolution inflated estimates of when modern mammals, which were once no larger than a guinea pig, diversified and evolved into the animals familiar to us today.
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Isn't it strange when you think about it that of all the mammals some modern cultures have created such a strange, unnatural way of thinking.
The classic story is that all modern mammal groups started to develop no more than 65 million years ago, after the end of the Cretaceous Period, when a probable meteorite impact led to a major extinction in which all the dinosaurs died.
And third, by 65 million years ago when modern types of «crown» mammals arose, regions of the brain that control neuromuscular coordination by integrating different senses had enlarged.