In my opinion antimatter will be the eventual solution to interstellar space travel due to its efficiency in using small amounts of it to produce large distances in space travel. At CERN they are able to produce several trillionths of a gram of antimatter at a cost of $20 million. Total worldwide production to date has been a few nanograms. Although that may seem like minuscule amounts produced it is 10-12 kilograms compared to what physicist Michio Kaku quotes Gerald Smith of Pennsylvania State University estimating that 4 milligrams of antimatter would take us to Mars (a milligram of antimatter is 10-6 kilograms). In terms of a size comparison we would need to move from production of antimatter from the size of a human cell to the size of a Mosquito. Kaku says that it is conceivable that if an atom smasher was built specifically just to produce lots of antimatter (current atom smashers have various purposes that are in demand) combined with mass producing these machines we could get antimatter production up significantly.
Antimatter is also the holy grail of some science fiction franchises. In Star Trek: the Original Series Engineer Montgomery Scott is always talking about various issues involving the antimatter and matter parts of the engineering portion of the starship Enterprise. In terms of reaching those fantastical journey’s that the Enterprise takes on in real life (possibly near the end of this century) 100 grams of antimatter will perhaps take us to nearby star systems.
In terms of the origin of the term antimatter it was first predicted by Paul Dirac in 1928 with his Dirac equation and later discovered in 1932 by Carl Anderson. In 2018 CERN proposed a containment technology that would allow a billion anti-protons to be contained in a device that could be driven to other labs. Labs similar to CERN where antimatter has been produced include the Fermi National Accelerator Laboratory (pictured in the featured image of this article) in the United States.