>>10359610 (lb)
yea, found it while digging through nanotech.
>Gray goo (also spelled grey goo) is a hypothetical global catastrophic scenario involving molecular nanotechnology in which out-of-control self-replicating machines consume all biomass on Earth while building more of themselves
https://en.wikipedia.org/wiki/Gray_goo
https://en.wikipedia.org/wiki/Engines_of_Creation
>Prince Charles called upon the British Royal Society to investigate the "enormous environmental and social risks" of nanotechnology in a planned report, leading to much media commentary on gray goo. The Royal Society's report on nanoscience was released on 29 July 2004, and declared the possibility of self-replicating machines to lie too far in the future to be of concern to regulators.[10]
>https://web.archive.org/web/20180701045316/http://www.nanotec.org.uk/finalReport.htm
you can probably find the op in qresear.ch by searching one of the less-used words above.
should be fairly recent.