"When we try to pick out anything by itself, we find it hitched to everything else in the Universe." —John Muir, My First Summer in the Sierra

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“Oh, Be A Fine Girl, Kiss Me”

—Traditional mnemonic for stellar classification

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A year and a half ago when I heard about a new Showtime series about human contributions to changing climate—Years of Living Dangerously—which aired its first episode this past week, my first thought was the classic 1982 Peter Weir film The Year of Living Dangerously.

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In 1990, Carl Sagan led a group of scientists in drafting and signing an open letter urging action on the various environmental crises facing the world, including the threat of nuclear war and the reality of nuclear pollution, as well as climate change, ozone depletion, and acid rain.

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