A rare two-headed crested gecko named Simon and Garfunkel was born five weeks ago at Rockstar Geckos in northeastern Pennsylvania, and social media can't get enough of the tiny reptile. MEET THREEHALVES: THE VIRAL ROBOT DESIGNED FOR EARTH'S MOST DANGEROUS ENVIRONMENTSAnother commented, "I've never seen a two-headed animal so active. According to Rockstar Geckos, polycephaly is especially rare in crested geckos, although it is more commonly documented in other reptiles, particularly snakes and turtles. "These little ones are thriving and doing all the classic gecko things completely on their own," Rockstar Geckos said. That's most likely due to their inability to hunt and eat bugs," Rockstar Geckos said in a five-week update.