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Why did hospitals have these frogs in their supply rooms? - Carly Anne York

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In the early 20th century, pregnancy testing required a slippery piece of equipment: a female African clawed frog. For decades, hospitals and research labs had a trusted supply of these handy creatures, employing their help in testing for pregnancy and in numerous other scientific endeavors. So what makes these frogs so special? Carly Anne York shares the secrets of these remarkable amphibians.

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TED-Ed Animations feature the words and ideas of educators brought to life by professional animators. Are you an educator or animator interested in creating a TED-Ed Animation? Nominate yourself here »

Meet The Creators

  • Educator Carly Anne York
  • Director Yajun Shi
  • Narrator Alexandra Panzer
  • Storyboard Artist Yajun Shi
  • Animator Yajun Shi, Dongyao Chai
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