This week's Grand Rounds is up at the misty and magical Blog, MD.
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El Misti in Peru, as seen from Arequipa.
“If I take dust in my hand and ask you if that is all the dust there is, you will answer that dust is everywhere on earth. More specks than can ever be numbered.
“In a word, in the eyes of a giant, to whom our Suns were what our atoms are to us, the Milky Way would only look like a bubble of gas.” -Henri Poincaré