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  1. Humans

    Supercooling tripled the shelf life of donor livers

    Cooling organs to subzero temperatures could help them last longer, making lifesaving transplants available to more people.

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  2. Earth

    Ancient crystal growths in caves reveal seas rose 16 meters in a warmer world

    The Pliocene era cave formations on the Spanish coast of Mallorca offer hints about how oceans could respond to human-driven climate change.

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  3. Readers ask about aging perceptions, coral reefs and more

    Readers had questions about aging perceptions, coral reefs, praying mantis vision and more.

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  4. Take a look at us now!

    Editor in Chief Nancy Shute discusses the magazine's history with the internet.