Tachyons

Tachyons, at least among certain people, can be credited to Star Trek. If it weren't for the completely bizarre character of these theoretical particles, they would probably be obscure and unknown. Just keep in mind that although some physicists believe they exist, they are not technically real.

The primary characteristic of a tachyon would be its speed. They move more quickly than light. Because nothing moves faster than light, many people assume that a tachyon cannot exist. But if there is proof, theoretical physics is open to accommodating anything.

According to what we know about time, a tachyon might move backwards through time if it moves faster than the speed of light. Normally, we assume that nothing can go faster than light since doing so would cause both its mass and the energy required to carry it to grow.

You would essentially be stationary at the speed of light. Tachions, however, accelerate as they lose energy, thus they may surpass that threshold. All the time paradoxes that we are familiar with from movies are also caused by it. And that's a fair excuse as to why they could not even exist. Of However, if they really exist but move faster than light, it makes sense that we haven't found them yet and that, in fact, we might never find them because of that.

Classification; Elementary particles
Status: Hypothetical
Theorized: 1967