An excellent summary and review but with one (standard) misleading comment in my opinion. You write;
The discovery of Jupiter’s little stars made Galileo resolve to publish quickly, before someone else had the bright idea of turning the new optical device on Jupiter.
Somebody, Simon Marius, already had. In fact all of Galileo's astronomical discoveries were made independently and contemporaneously by other observers, Marius, Harriot, Lembo etc., so if he had never lived it would have had very little influence on the development of astronomy.
posted by Thony Christie
May 2, 2011 @ 10:26 AM
"Penguins are 10 times older than humans and have been here for a very, very long time," said Daniel Ksepka, Ph.D., a North Carolina State University research assistant professor. Dr. Ksepka researches the evolution of penguins and how they came to inhabit the African continent.
Because penguins have been around for over 60 million years, their fossil record is extensive. Fossils that Dr. Ksepka and his colleagues have discovered provide clues about migration patterns and the diversity of penguin species.
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