"In just over 30 years, humans will be able to upload their entire minds to computers and become digitally immortal." – Ray Kurzweil, Global Futures 2045 International Congress (2013). Without even considering the ethical, philosophical, social or legal scope of such a statement, it’s important to consider if it actually makes any sense. To try to give an educated guess, we have to move away from computer science and look at what biology and neuroscience can teach us.