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How Mammals Conquered the World

An interesting article from Scientific American that provides much more detail on how mammals survived and evolved the great extinction event caused by a giant asteroid that wiped out the dinosaurs 66 million years ago: https://www.scientificamerican.com/article/how-mammals-conquered-the-world-after-the-asteroid-apocalypse/.



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As I studied Einstein's thoughts on relativity, I found myself wondering, "what is the speed of thought?" There are several subtle mentions of this in the book (e.g., 14-40 milliseconds to get from br

Thanks to Ben Chappell for sending this link to a nice playlist from the Fermi Lab that helps explain relativity in simple lay-person terms: https://www.youtube.com/watch?v=Txv7V_nY2eg.

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