“Picasso never had to explain that his mistresses weren’t actually cubic, but [Viktor] Deak has taken grief over as little as a flexed knee.” Such is life when you’re a high-profile paleoartist. “If you find yourself face to face in a museum with Homo habilis, Australopithecus afarensis or Paranthropus boisei, you may be looking at his work. Many of the images of hominids in the new Hall of Human Origins at the American Museum of Natural History are his….”