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  1. Tech

    How NASA’s portable atomic clock could revolutionize space travel

    An atomic clock designed to enable self-driving spaceships and GPS-like navigation on other planets is about to take a yearlong test flight.

    By Maria Temming
  2. Science & Society

    Lost wallets are more likely to be returned if they hold cash

    Worldwide, return rates of lost wallets goes up as the money inside increases, contradicting the idea that people act in their own self-interest.

    By Sujata Gupta
  3. Animals

    U.S. honeybees had the worst winter die-off in more than a decade

    Colonies suffered from parasitic, disease-spreading Varroa mites. Floods and fire didn’t help.

    By Susan Milius
  4. Oceans

    The world’s fisheries are incredibly intertwined, thanks to baby fish

    A computer simulation reveals how one nation's management of its fish spawning grounds could significantly help or hurt another country's catch.