How a Frog Became the First Mainstream Pregnancy Test
Yahoo News (USA) May 4th, 2017 06:00 AM: How a Frog Became the First Mainstream Pregnancy Test
The African clawed frog, Xenopus laevis, is a palm-sized, greenish-gray animal that hails from the ponds and rivers of sub-Saharan Africa, where it lived for millions of years without anyone injecting it with urine. That unbroken streak changed in the 1930s, thanks to a British scientist with the fantastic name of Lancelot Hogben.
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