According to our current understanding of physics, objects with mass cannot travel faster than the speed of light in a vacuum. The theory of special relativity, developed by Albert Einstein, has been extensively tested and has consistently been found to accurately describe the behavior of matter and energy at high speeds.
As an object with mass approaches the speed of light, its energy increases, and its relativistic mass becomes larger. This means that it would require an infinite amount of energy to accelerate a massive object to the speed of light, which is why it is considered impossible.
There are no confirmed examples in nature of objects with mass traveling faster than the speed of light. All observed phenomena and experimental evidence support the principle that the speed of light in a vacuum (approximately 299,792,458 meters per second) is an ultimate cosmic speed limit.
However, it's essential to distinguish between the speed of light in a vacuum and the apparent speed of light in other media. Light can slow down when passing through different substances like water or glass, but it never exceeds its vacuum speed in any medium.
There are some theoretical particles, such as tachyons, that are thought to travel faster than light. However, these hypothetical particles have not been observed, and their existence remains speculative. Moreover, tachyons, if they exist, would behave very differently from ordinary matter and would violate causality, leading to paradoxes that are not consistent with our current understanding of the universe.
Until now, there has been no experimental evidence to suggest that objects with mass can move faster than the speed of light. The theory of special relativity has been extremely successful in predicting and explaining the behavior of the cosmos, and no exceptions have been observed to the universal speed limit imposed by the speed of light in a vacuum.