Part 2/10:
Researchers have hypothesized that if spacecraft could travel close to the speed of light, we might experience time dilation—a phenomenon where time slows down relative to observers at rest. According to these principles, a journey spanning millions of light-years could be crossed in mere moments, albeit at the cost of decades, if not millennia, passing for those remaining on Earth. Time travel, then, becomes a possible exploration of the future rather than the past.