M Watson/Ardea/Caters News
  • Animals Laugh

    A cheery chimpanzee can be seen sporting a toothy grin as he enjoys life at Chimfunshi Wildlife Orphanage in Zambia.
    M Watson/Ardea/Caters News
  • Animals Laughing

    A chuckling cheetah creases up in Kenya.
    Ferrero Labat/Ardea/Caters News
  • Animals Laughing

    An Alpine marmot grins.
    Duncan Usher/Ardea/Caters News
  • Animals Laughing

    A pot-bellied pig is clearly tickled pink at his home in Lower Saxony, Germany.
    Duncan Usher/Ardea/Caters News
  • Animals Laughing

    A bottlenose dolphin is amused and enjoys a good, old giggle.
    A L Stanzani/Ardea/Caters News
  • Animals Laughing

    A snowy owl is joshing around.
    Andrey Zvoznikov/Ardea/Caters News
  • Animals Laughing

    An Icelandic horse appears to be amused when he spots a photographer's camera.
    John Daniels/Ardea/Caters News
  • Animals Laughing

    A Bactrian camel snickers.
    M Watson/Ardea/Caters News
  • Animals Laughing

    A red fox cracks up in hysterics.
    M Watson/Ardea/Caters News
  • Animals Laughing

    A sea otter opens his mouth to laugh.
    Duncan Usher/Ardea/Caters News
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PHOTO: A home damaged by a landslide Friday, April 18, 2014 in Jackson, Wyo. is shown in this aerial image provided by Tributary Environmental.
Tributary Environmental/AP Photo
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PHOTO: Woman who received lab-grown vagina says she now has normal life.
Metropolitan Autonomous University and Wake Forest Institute for Regenerative Medicine