Magnetic Bottles

Containing plasma is one of the great engineering challenges in physics. Plasma is far too hot for any physical container — it would vaporize any wall it touches. Because plasma consists of charged particles, it responds to magnetism.

The goal is nuclear fusion — forcing hydrogen nuclei to merge and release energy, mimicking the process that powers stars. Projects like ITER in France are designed to test whether magnetic confinement can sustain reactor-scale fusion conditions. If the technology eventually works commercially, it could become a major low-carbon power source, but it is not yet a replacement for today's electrical grid.