Karl Gruber

All Stories by Karl Gruber

  1. Animals

    These spiders can purr

    This wolf spider can purr like no other. It makes vibrations and sounds to tell a female he’s interested in her.

  2. Archaeology

    Hobbits: Our tiny cousins

    Skeletal remains of ancient human relatives found in Indonesia are challenging some long-accepted “truths” about human evolution.

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