Spending $31,000 for one of John Lennon’s teeth in 2011 was only the start of Michael Zuk’s strange behavior: The Canadian dentist wants to clone the late Beatles legend, and his mad-scientist plan to do so is moving forward.Recently, Zuk sent the 50-plus-year-old tooth to a lab, hoping to find a shred of genetic data that would help sequence Lennon’s DNA.“I am nervous and excited at the possibility that we will be able to fully sequence John Lennon’s DNA, very soon I hope,” Zuk said in a statement on his John Lennon Tooth site. “With researchers working on ways to clone mammoths, the same technology certainly could make human cloning a reality.”