Can humans travel at the speed of light?

If it moves at 10 percent the speed of light, for example, its mass will only be 0.5 percent more than normal. But if it moves at 90 percent the speed of light, its mass will double. As an object approaches the speed of light, its mass rises precipitously. read more

Therefore, humans should – in theory – be able to travel at rates just short of the “Universe’s speed limit”: the speed of light. But assuming we can overcome the considerable technological obstacles in building faster spacecraft, our fragile, mostly-water bodies will have to contend with significant new hazards that come with such high-speed travel. read more

Travel at the speed of light and, theoretically, the clock would stop altogether. How much the time dilates can be calculated by the two equations above. On the right, Δt is the time interval between two events as measured by the person they affect. read more