have been born with a physical deficiency. Doctors prescribe medicines such as Ritalin and Adderall to improve cognitive focus, and many people take "lifestyle" drugs such as Viagra, Propecia, and Botox to restore aspects of youthfulness that have been lost in maturity. Other transhumanists, such as cyborg artist Neil Harbisson, use technologies and techniques to improve their senses and perception of reality. Harbisson's antenna, which is permanently implanted in his skull, allows him to sense colours beyond human perception such as infrareds and ultraviolets. Technologies of interest Transhumanists support the emergence and convergence of technologies including nanotechnology, biotechnology, information technology and cognitive science (NBIC), as well as hypothetical future technologies like simulated reality, artificial intelligence, superintelligence, 3D bioprinting, mind uploading, chemical brain preservation and cryonics. They believe that humans can and should use these technologies to become more than human. Therefore, they support the recognition and/or protection of cognitive liberty, morphological freedom and procreative liberty as civil liberties, so as to guarantee individuals the choice of using human enhancement technologies on themselves and their children. Some speculate that human enhancement techniques and other emerging technologies may facilitate more radical human enhancement no later than at the midpoint of the 21st century. Kurzweil's book The Singularity is Near and Michio Kaku's book Physics of the Future outline various human enhancement technologies and give insight on how these technologies may impact the human race. Some reports on the converging technologies and NBIC concepts have criticised their transhumanist orientation and alleged science fictional character. At the same time, research on brain and body alteration technologies has been accelerated under the sponsorship of the U.S. Department of Defense, which is interested in the battlefield advantages they would provide to the supersoldiers of the United States and its allies. There has already been a brain research program to "extend the ability to manage information", while military scientists are now looking at stretching the human capacity for combat to a maximum 168 hours without sleep. Neuroscientist Anders Sandberg has been practicing on the method of scanning ultra-thin sections of the brain. This method is being used to help better understand the architecture of the brain. As of now, this method is currently being used on mice. This is the first step towards hypothetically uploading contents of the human brain, including memories and emotions, onto a computer. Debate The very notion and prospect of human enhancement and