Einstein shows the way
One of the first things that drew me to physics was the theory of relativity. It is so counter intuitive that it caught my imagination right away. After all relativity shows us that time travel to the future is indeed possible, provided you travel fast enough, and who can resist that. But this theory is by no means restricted to just some abstract physics. It is absolutely essential for GPS to work. This is what I touch on in my latest article for the New Indian Express.
Here is a video that explains the same.