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  1. Readers talk science dioramas, an underwater volcano eruption, a zero-less number system

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  2. Earth

    3 things to know about the deadly Myanmar earthquake

    The magnitude 7.7 earthquake was powerful, shallow and in a heavily populated region with vulnerable buildings.

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  3. Genetics

    ‘Woolly mice’ were just a start. De-extinction still faces many hurdles

    Scientists created transgenic mice with woolly mammoth–like traits. But does it really bring us closer to bringing back woolly mammoths?

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  4. Space

    ‘Star Wars’ holds clues to making speedier spacecraft in the real world

    Controlled fusion, solar sails or ion engines could someday help spaceships travel between star systems.