Calling Vladimir Demikhov a mad scientist may undercut his contributions to medicine, but some of his radical experiments certainly fit the bill.
Case in point when in the 1950s, Demikhov actually created a two-headed dog, resulting in both heads being able to hear, see, smell, and swallow. Read about how Soviet scientists literally created a two-headed dog here: http://bit.ly/2Dk8s7d
