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azrael writes:

Mashable reports on the latest medical breakthrough from a government-funded lab in North Carolina. The lab has already grown tissue for 30 human organs, including kidneys, hearts, bladders, urethras and even vaginas. Now scientists have added another vital organ to the list: the penis.

The Wake Forest Institute for Regenerative Medicine in Winston-Salem has successfully engineered the first six lab-grown human penises, the scientists revealed over the weekend — and they're just waiting for FDA approval to move forward with what they call "in-man" testing.

In the meantime, the engineered penises are being put through their paces in the lab — courtesy of machines that squash, twist and stretch the organs, and pump them full of fluid to test their erections.