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  1. Tech

    This solar-powered device produces energy and cleans water at the same time

    Someday, the two-for-one machine could help curb electricity and freshwater shortages.

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  2. Earth

    3 questions seismologists are asking after the California earthquakes

    After back-to-back quakes, scientists are scrambling to figure out which faults ruptured and what it means for future California quake activity.

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  3. Artificial Intelligence

    Artificial intelligence has now pretty much conquered poker

    A new artificial intelligence called Pluribus is a real card shark at six-player no-limit Texas Hold’em.

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  4. Animals

    Southern right whale moms and calves may whisper to evade orcas

    Mother-calf whale pairs call to each other quietly to stay in touch while avoiding attracting the attention of predators, a study suggests.