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Essays on Infinite Lifespans  
Raymond Kurzweil
nals from our real senses with the signals that our brain would 
receive if we were actually in the virtual environment.
We  will  have  panoply  of  virtual  environments  to  choose 
from, including earthly worlds that we are familiar with, as 
well as those with no earthly counterpart. We will be able 
to go to these virtual places and have any kind of interaction 
with other real (as well as simulated) people, ranging from 
business negotiations to sensual encounters. In virtual reality, 
we wont be restricted to a single personality, since we will be 
able to change our appearance and become other people.
The most important application of circa-2030 nanobots will 
be to literally expand our minds. Were limited today to a mere 
hundred trillion inter-neuronal connections; we will be able 
to augment these by adding virtual connections via nanobot 
communication. This will provide us with the opportunity 
to vastly expand our pattern recognition abilities, memories, 
and overall thinking capacity as well as directly interface with 
powerful forms of nonbiological intelligence.
Its important to note that once nonbiological intelligence 
gets  a  foothold  in  our  brains  (a  threshold  weve  already 
passed),  it  will  grow  exponentially,  as  is  the  accelerating 
nature of information-based technologies. A one-inch cube of 
nanotube circuitry (which is already working at smaller scales 
in laboratories) will be at least a million times more powerful 
than the human brain. By 2040, the nonbiological portion of 
our intelligence will be far more powerful than the biological 
portion. It will, however, still be part of the human-machine 
civilization,  having  been  derived  from  human  intelligence, 
i.e., created by humans (or machines created by humans) and 
based at least in part on the reverse-engineering of the human 
nervous system.
Stephen  Hawking  recently  commented  in  the  German 
magazine Focus that computer intelligence will surpass that of 
humans within a few decades. He advocated that we develop