According to our current understanding of physics, it is not possible for an object with mass, such as a human being, to travel at the speed of light in a vacuum. As an object with mass approaches the speed of light, its mass would theoretically become infinitely large, requiring an infinite amount of energy to accelerate further. This concept is described in Einstein's theory of relativity.
If we consider a hypothetical scenario where a human could travel slightly faster than the speed of light, the consequences would still be problematic. The theory of relativity suggests that as an object with mass approaches the speed of light, its energy and momentum increase significantly. If an object were to exceed the speed of light, its energy and momentum would become infinite, which violates the known laws of physics.
Furthermore, traveling at such incredibly high speeds would have severe implications for the human body. As an object accelerates, its mass increases, and time dilation occurs, which means that time would pass more slowly for the traveler compared to a stationary observer. This effect becomes more pronounced as the speed approaches the speed of light.
For a human to survive traveling at such speeds, they would require some form of advanced technology or theoretical physics that we are currently unaware of. As of now, the speed of light remains an insurmountable barrier for objects with mass, and traveling faster than light is purely speculative and not supported by our scientific understanding.