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  1. 19889

    The news is filled with observations of our species’ role in global warming and in the depletion of fisheries, arable land, fresh water, and fossil fuels. Yet I seldom hear the size of the human population cited as a driving force behind these problems. The easiest path to reducing our environmental footprint would be to […]

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  2. Earth

    Invasive, Indeed

    Some people may live lightly on the land, but the demands of the world's population as a whole consume nearly a quarter of Earth's total biological productivity.

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  3. Tech

    Disappearing Ink

    Coming to your tattoo parlor soon: New inks that allow clients to have their designs cleanly erased if embarrassment or regret sets in.