According to our current understanding of physics based on Einstein's theory of relativity, it is not possible for anything with mass to travel at or exceed the speed of light in a vacuum. As an object with mass approaches the speed of light, its relativistic mass increases, requiring an infinite amount of energy to reach the speed of light. This concept is known as mass dilation.
If somehow an object were to exceed the speed of light, it would violate causality, which is the principle that cause and effect should occur in a logical sequence. This could lead to paradoxes and inconsistencies in our understanding of the universe.
At speeds greater than the speed of light, the laws of physics, as we currently understand them, break down. It is difficult to predict precisely what would happen because it would require a hypothetical scenario that contradicts our current scientific knowledge. However, there are some speculative theories, such as the existence of tachyons (hypothetical particles that always travel faster than light), but these ideas are purely theoretical and lack empirical evidence.
It's important to note that the theory of relativity has been extensively tested and confirmed through numerous experiments and observations. Thus, traveling faster than the speed of light is currently considered impossible within the framework of our understanding of physics.