In a stark Soviet laboratory in the 1950s, a photograph captured a scene that still unsettles viewers today. A large dog stood while the head and forelimbs of a smaller dog had been surgically grafted ...

The two-headed dog experiments were, in his framing, a way to test whether a transplanted cardiovascular system could sustain a living organism. Between 1954 and the early 1960s, Demikhov created ...