In the 1950s, a Soviet scientist named Vladimir Demikhov created a two-headed dog — and both heads were able to hear, see, smell, and swallow.

In the 1950s, a Soviet scientist named Vladimir Demikhov created a two-headed dog — and both heads were able to hear, see, smell, and swallow.⁠

Amidst much controversy, Demikhov chose a German Shepherd named Brodyaga to be the “host” dog with a smaller dog named Shavka supplying the secondary head and neck. For the surgery itself, Demikhov amputated Shavka’s lower body below the forelegs, keeping her heart and lungs connected until just before the transplant. Then, he attached Shavka’s upper body to a corresponding incision in Brodyaga’s neck.⁠
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Tragically, both dogs would die just four days after the operation due to the damage of a crucial vein. And even more horrifying, this was just one of the unholy transplants he performed.