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Protomatter in a sample container

"Protomatter – an unstable substance which every ethical scientist in the galaxy has denounced as dangerously unpredictable."

Protomatter was a highly dangerous, unstable form of matter

Its hazardous properties led to its denunciation by most 23rd century scientists, but this did not stop David Marcus from secretly using it while trying to solve certain fundamental problems inherent in the Project Genesis matrix. By doing so, he inadvertently doomed the project to failure as it caused the planet formed by the matrix to inherit the unstable properties of the protomatter. The planet itself aged very rapidly and eventually exploded. (Star Trek III: The Search for Spock)

In 2370, Professor Gideon Seyetik used protomatter to reignite the star Epsilon 119. (DS9: "Second Sight")

According to Robert Hewitt Wolfe, Seyetik's device was based upon the Genesis Device as seen in Star Trek II: The Wrath of Khan; "It was established Federation terraforming technology. Of course, the Genesis device didn't work, but obviously Seyetik's work is built upon the research of previous scientists. And it was a nice way to reference the movie." (Star Trek: Deep Space Nine Companion, p. 103)

Also in that year, the Maquis incorporated protomatter in an implosion device designed to overload the impulse drive of the Cardassian freighter Bok'Nor. (DS9: "The Maquis, Part I")

In 2373, a Changeling infiltrator impersonating Dr. Julian Bashir tried and failed to destroy the Bajoran sun with protomatter, trilithium and tekasite. (DS9: "By Inferno's Light")

Protomatter was among the most highly valued commodities in a region of the Delta Quadrant, reputed to be "the best source of energy in the quadrant". Neelix had dealt with protomatter when he worked as a trader, which in one instance led to conflict with the Kazon. He owned a containment cylinder designed to hold a small quantity of protomatter.

In 2374, the USS Voyager encountered a class 1 nebula that contained high concentrations of protomatter. Neelix was killed while protomatter was beamed into his containment cylinder. Seven of Nine subsequently brought him back to life with her Borg nanoprobes. B'Elanna Torres speculated that a phase variance in the transporter beam was responsible for igniting the sample of protomatter that Neelix had attempted to collect. (VOY: "Mortal Coil")

"Proto-matter" was referenced in the first draft script of VOY: "Death Wish", to have been established during the Big Bang. However, this was ultimately replaced with a reference to baryonic particles instead.



In the novel Foul Deeds Will Rise, Captain James T. Kirk and the crew of the Enterprise-A participate in crucial disarmament talks for two planets, with some of the natives attempting to finish the war by stealing one of the protomatter warheads that are being destroyed as part of the peace process and launching the warhead at a major city on the other planet, but these efforts are thwarted thanks to the actions of Spock, Montgomery Scott, and the redeemed Lenore Karidian.

In the The Genesis Wave trilogy, Captain Jean-Luc Picard reads a summary of the Genesis project that includes the observation that the instability of the Genesis planet was caused due to it being created from the remains of the Mutara Nebula rather than the protomatter being the problem in itself, speculating that the Genesis effect would have been successful if it had been used on a lifeless planet as it had been originally intended.

In the Star Trek Online mission "Echoes of Light", while aiding a recently warp-capable species, the Lukari, was their first major test flight through space, they discover a planet wiped clean by protomatter. The Lukari captain, Kuumaarke, mentions that protomatter can actually be quite stable if you know how to work with it right. In their investigation, the player character learns that the Tzenkethi had set off a protomatter bomb, wiping out all life on the planet. It is later discovered that the Tzenkethi have developed additional protomatter weapons and were detonating them on other inhabited worlds in distant parts of the Alpha quadrant.

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