According to our current understanding of physics, it is highly unlikely that humans could travel at the speed of light. The theory of relativity, proposed by Albert Einstein, suggests that as an object with mass accelerates, its energy and momentum increase, and its mass appears to increase as well. As an object with mass approaches the speed of light, its energy and momentum become infinitely large, making it impossible to reach or exceed the speed of light.
Additionally, the amount of energy required to accelerate an object with mass to the speed of light would be enormous. As an object with mass approaches the speed of light, its kinetic energy increases exponentially, requiring an infinite amount of energy to reach the speed of light itself. This energy requirement exceeds any currently conceivable means of propulsion.
Furthermore, traveling at the speed of light would have other significant consequences. According to relativity, as an object with mass accelerates close to the speed of light, time dilation occurs. Time slows down for the moving object relative to a stationary observer. As a result, reaching the speed of light would require an infinite amount of time from the perspective of an observer at rest. This would make it impossible to reach the speed of light within a finite duration from the perspective of a human traveler.
While it seems unlikely that humans will ever travel at the speed of light, there have been scientific discussions and explorations of concepts like wormholes, warp drives, and other hypothetical ideas for faster-than-light travel. However, these concepts are highly speculative and currently beyond the realm of our scientific understanding.
It's worth noting that our understanding of physics is continually evolving, and future discoveries may challenge our current limitations. But based on our current knowledge, traveling at the speed of light appears to be an insurmountable challenge for human beings.