Since the Superconductor, humans were able to produce miniature black holes. However, harnessing singularity power was a different matter entirely, since it required larger and heavier specimens. Rampant space colonization of the 25th century brought revolutionary breakthroughs in particle physics, thus allowing production of useable black holes in deep space Nano Factories. Another important factor was the steady development of Wormhole physics, which helped allow transporting a black hole with ease and relative safety, as well as enabled recovery of one that would fall to the Earth's core. Still, even a completed and secured black hole needed and extremely complex building in order to yield the energy, which was considered cutting-edge even for its time. Once a Singularity Plant was running though, it provided enormous amounts of energy that could be used for powering whole states. It did have its drawbacks of course: running even one Singularity Plant was a strain on the economy, and despite all precautions they prove to be very unpopular with the population, resounding old fears about the destruction of the Earth.