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  1. Materials Science

    A fiber inspired by polar bears traps heat as well as down feathers do

    Scientists took a cue from polar bear fur to turn an ultralight insulating material into knittable thread.

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  2. Archaeology

    An ancient, massive urban complex has been found in the Ecuadorian Amazon

    Found by airborne laser scans, this settlement and others throughout Mesoamerica and the Amazon are shifting how archaeologists think about urbanism.

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  3. Climate

    Numbats are built to hold heat, making climate change extra risky for the marsupials

    New thermal imaging shows how fast numbats’ surface temperature rises even at relatively reasonable temperatures.

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  4. Paleontology

    The oldest known fossilized skin shows how life adapted to land

    The nearly 290 million-year-old cast belonged to a species of amniotes, four-legged vertebrates that today comprises all reptiles, birds and mammals.