A student supposedly noticed his professor had handed out the exact same exam as the year before and pointed it out, expecting a mistake. The professor's reply became one of the most quietly profound things ever said about science. The questions were the same, he agreed, but this year the answers are different. The idea captures something deeply true about how knowledge works. In most subjects we imagine facts as fixed, carved in stone. But real science is a living thing. The questions humanity asks stay remarkably constant across generations. What is light? What is time? What is the universe made of? Yet the answers keep evolving as we learn more. Think about how radically the answers have shifted. Once we were certain atoms were the smallest possible things. Then we split them. Once space and time were seen as absolute and unchanging. Then relativity showed they bend and stretch. Once the universe seemed static. Then we discovered it is expanding, and accelerating. The questions barely changed. The answers were rewritten completely. That is the heart of the scientific spirit. It is not a collection of final truths to memorize. It is a willingness to return to the same deep questions again and again, humble enough to accept that a better answer might replace the one we cling to today. A scientist treats certainty as temporary. The best minds are not the ones with all the answers. They are the ones brave enough to keep questioning the answers they already have. If the answers keep changing, what scientific truth we hold today do you think might be rewritten next?

Sometime, "the truth" is relative.