Grey goo (alternatively spelled gray goo) is a hypothetical end-of-the-world scenario involving molecular nanotechnology in which out-of-control self-replicating robots consume all matter on Earth while building more of themselves, a scenario known as ecophagy ("eating the environment").
Self-replicating machines of the macroscopic variety were originally described by mathematician John von Neumann, and are sometimes referred to as von Neumann machines. The term grey goo was coined by nanotechnology pioneer Eric Drexler in his 1986 book Engines of Creation, stating that "We cannot afford certain types of accidents." In 2004 he stated "I wish I had never used the term 'grey goo'."
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Famous quotes containing the words grey and/or goo:
“Fretted shadow on stumps
A vanishing husk
Of light . . . grey lumps
Of stone verge the hills with fears.
It is quickly dusk.”
—Allen Tate (1899–1979)
“Since I do miss your vaice an’ feace
In prayer at eventide,
I’ll pray wi’ woone said vaice vor greace
To goo where you do bide;”
—William Barnes (1801–1886)