The planet Earth is, to a good approximation, a perfect sphere. But, it isn't perfectly spherical.
Space-time in the universe as a whole is, to a good approximation, perfectly Euclidian. But, it has some curvature.
The magnitude by which the Earth differs from being a perfect sphere (in relative terms) is roughly similar to the magnitude by which the universe differs from being perfectly Euclidian. And, both on average and at the greatest extremes, Earth differs less from being perfectly spherical in relative terms, than the space-time of the universe differs from being perfectly Euclidean.
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any thoughts on Yunxian 2
Not yet. I've bookmarked articles to review and write about, but the new job is surprisingly eating into my time to science blog (where science discoveries, especially in anthropology, take more time to read carefully and then write about), than in my other one (where it is easier to write off the cuff if I am willing to dispense with my usual number of links to support what I'm writing).
Yunxian 2 may suggest Asia origins
Did you read John Hawk's comments on Yunxian2? He seems to the think that the writers of the recent paper pushed their model further than the data allows and majors a less radical reconstruction of the hominin tree.
majors = favors, don't know why that looked right upon initial review.
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