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Claim A says Demikhov grafted a puppy's head onto a German Shepherd's neck. Claim B says the two-headed dog could only survive underwater in a tank. Claim A is true, and Claim B is completely made up.
In the 1950s, Soviet surgeon Vladimir Demikhov performed one of the strangest experiments in medical history. He surgically attached the head and front legs of a puppy onto the neck of a fully grown German Shepherd, creating a living two-headed dog.
Shockingly, the creature actually survived the procedure. Both heads were functional — they could drink water, blink, and even snap at each other independently, according to witnesses who saw the dogs in Demikhov's lab.
The dog lived for several days after the surgery, which was an extraordinary feat of transplant science for the time. Demikhov performed this type of procedure multiple times throughout his career, pioneering techniques that would later influence organ transplant research worldwide.
His work was considered so medically significant that Western scientists, including early heart transplant pioneers, traveled to the Soviet Union just to observe his methods firsthand.
As for Claim B — there was no requirement that the two-headed dog live in water. The real experiments took place on dry land in a lab setting, with the dogs cared for like any other post-surgical patient, not aquatic creatures.
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