The particles, he said, are made from ordinary hydrogen, whose atoms are the simplest in nature.

As a result, tritium can more easily fuse with other light atoms, compared with the ability of ordinary hydrogen to do so.

Instead of ordinary hydrogen, fusion reactors use heavier versions, known as deuterium and tritium, that fuse together more easily.

However, ordinary hydrogen is not viewed as a fusion fuel that could be used in the foreseeable future.

Among the atoms that can act as bosons are ordinary hydrogen, metallic sodium and alkali metals like cesium.

In ordinary hydrogen the bulky proton is almost at rest relative to the flighty lightweight electron which encircles it.

Thus muonic hydrogen is similar to ordinary hydrogen but for two important features.

Otherwise, ordinary hydrogen would not be so widespread, and stellar evolution would be quite different.

For every six thousand atoms of ordinary hydrogen in the world's oceans,, there is one atom of deuterium.

A technologically advanced civilization may develop fusion reactors capable of using ordinary hydrogen by currently unknown means.