Gray goo (or grey goo)
Gray goo (or,
in British spelling, "grey goo") is a term used to describe what life
on our planet might become if self-replicating robots or nanomachines got out of control and began
to use up life forms for their own energy needs in some unstoppable way.
The term was
first used in K. Eric Drexler in his seminal book about nanotechnology, Engines of Creation.
Michael Crichton's Prey is one of several science fiction novels about
gray goo catastrophes. The possibility of all of us becoming a lifeless
conglomeration of gray goo, whether by accident or by robotic intent, is
considered exceedingly unlikely. However, it has been taken seriously enough by
one researcher, Robert Freitas, to suggest some public policy recommendations.
In
self-replication at the "nano" or molecular level, some source of
energy would be needed and it would seem that these would be the same sources
used by life forms or from life forms themselves (just as human beings derive
energy from eating other animals that have obtained their energy from lower
life forms). In the competition for energy with nanomachines, human beings might find
themselves unable to adapt quickly enough through natural evolution, ultimately
falling prey to their own intellectual creations.
A significant
argument against the possibility of a gray goo situation is that engineers
should be able to build in limiting conditions for self-replication. One
writer, Chris Phoenix, says that it is as unlikely that a molecular manufacturing system could
degenerate into unstoppable self-replication as that a drill press or lathe
might self-replicate. Phoenix refers to nanorobots that self-replicate only for the
limited purpose of a specific task, such as cleaning and closing a wound.
Variations on
this term include:
- Black goo or red gloo, the use of nanomachines by terrorists or nihilist to destroy all or some segment of humanity.
- Pink gloo, a view of humanity itself, which can be seen as a self-replicating entity with a tendency to fill up existing space.
- Green gloo, the idea of some antidote to the tendency of pink gloo to spread, perhaps limiting its ability to reproduce.
https://www.youtube.com/watch?v=HTgYHHKs0Zwscoop_post=bcaa0440-2548-11e5-c1bd-90b11c3d2b20&__scoop_topic=2455618
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