General term for nanomachines or bionano swarms, especially dangerous replicators. Types include Grey Goo (mindless replicators converting matter into more goo), Red Goo (weapon or malicious goo), Khaki Goo (military goo), Golden Goo (dangerous accidental goo), Green Goo (out of control bionano) and Ultraviolet Goo (ai-equipped goo). The most common defence is Blue Goo (immune nanodevices).
Goo is limited by the amount of ambient energy available in an environment, or by the amount of energy the swarm can store or generate. It is also limited by the availablity in the environment of raw materials for replication, and thermodynamic considerations. Goo may be vulnerable to electromagnetic pulse attack, depending on the design. Blue Goo may be effective against a particular swarm, or that swarm may be resistant to the defences, in which case the Blue Goo may be capable of adapting (or it may not, in which case new forms of defence must be developed rapidly).
- ::NN:: NANOSWARM NEWS - Ser Geshik
- ::NN:: NANOSWARM NEWS - The Horror at the Museum
- Aggressive Self-replicating Swarm
- Disassembler Swarms, Black Goo
- Goo, Blue
- Goo, Golden - Text by M. Alan Kazlev, from Anders Sandberg's Transhumanist Terminology
A type of goo disaster, the strange name comes from an early Information Age hypothetical scenario. The idea was to use nanomachines to filter gold from seawater. If this process got out of control the result would be piles of golden goo (the " Wizard's Apprentice Problem"). This scenario demonstrated the need of keeping populations of self-replicating machines under control; it is much more common than grey goo, but also more manageable. Also Carbon Goo, Aluminium Goo, etc.
- Goo, Green - Text by M. Alan Kazlev
 A plague of bionano (non-drexlerian) goo; especially of strong biotic form. Green Goo outbreaks are (like Golden Goo) quite common, but easily managed, at least in those areas with good access to blue goo and equivalent.
 Facetious term for biological life spreading throughout the galaxy. c.f. pink goo.
 (archaic) The scenario of nanomachines or bio-engineered organisms used for human population control, either by governments or eco-terrorist groups (generally by sterilizing people through otherwise harmless infections).
- Goo, Grey
- Goo, Khaki
- Goo, Love
- Goo, Pink
- Goo, Shadow
- Googlider - Text by Xaonon
Type of filiglider that carries biogoo, especially blue goo and is larger than a standard filiglider so that it can handle a photosynthetic waste recycler system.
- Limitations of Nanoweapons
- Madvert Goo - Text by John B
A self-replicating Logooze.
- Memetic Self-replicating Swarm
- Monopathic Swarm - Text by M. Alan Kazlev
Blight-like distributed entities trying to expand, disregarding the wishes and rights of other sentients.
Although this is sometimes used as a pejorative against expansive empires, it properly refers only to homogeneous swarms. monopathic swarms might be both intelligent and non-intelligent.
- Nanodisaster, The
- Nanotechnology Side-effects
- Swarm (nanotech or biology)
- Utility Fog
- Utility Sand