Based on our current understanding of physics, it is not possible for a human or any object with mass to travel at or faster than the speed of light. The theory of relativity, specifically Einstein's special theory of relativity, tells us that as an object with mass accelerates, its energy increases, and its relativistic mass also increases. As the object approaches the speed of light, its relativistic mass becomes infinitely large, and it would require an infinite amount of energy to accelerate it to or beyond the speed of light. This is known as the mass-energy equivalence principle.
Moreover, as an object with mass approaches the speed of light, its relativistic effects become significant. Time dilation occurs, meaning that time appears to slow down for the object in motion relative to an observer at rest. As the object approaches the speed of light, time dilation becomes more pronounced, and it would effectively take an infinite amount of time for the object to reach the speed of light.
Therefore, according to our current scientific understanding, it is not possible for a human or any material object with mass to travel at or faster than the speed of light. The immense energy requirements and the limitations imposed by relativity make such travel unachievable.