Lazarus/Anti-Lazarus was human according to Spock's sensors and Kirk's log:

• "A living being. Body temperature 98.5 Fahrenheit. Mass, electrical impulses, movement. It is apparently Human, Captain." - Spock
• "Sensors have reported the presence of a Human being on the planet below who might be connected with the phenomenon." - Kirk
  • --Alan del Beccio 15:08, 17 Oct 2005 (UTC)

Yes -- this was a very convoluted episode, as it was never really specific on where Lazarus's people, who died, were actually from -- were they humans in our universe, a parallell universe/dimension/possible time permutation, or humans that evolved independantly from Earthers, like Miri or the 892-IV Romans, or were they humans that had simply been out of touch with Earth, like the North Star/37's/Bringloidi-Mariposans/Terratins. But he was human, nonetheless -- Captain Mike K. Bartel^talk 16:29, 17 Oct 2005 (UTC)