Credit: Elias Castillo/flickr

William H. Schlesinger: Patriotism in a globalized world

On a full planet, how we divide up finite resources, may well define our future—as one of conflict or one of enlightenment.

When photographed from space, the Earth appears as a blue planet, with swirls of clouds passing over its surface that circulate its atmosphere from pole to pole and top to bottom, mixing it over time periods of a few months.

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Credit: Kai Schreiber/flickr

William H. Schlesinger: What happens when you flush?

Although often attributed to Sir John Crapper, it was Alexander Cumming who perfected the design of the flush toilet in 1775, forever changing the way that humans dispose of their personal waste.

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