The speed of light in a vacuum is around 300,000,000 meters per second (for those more accustomed to freedom units, that’s 186,282 miles per second). Thanks to Albert Einstein and many other prominent scientists, we believe that only massless particles like photons are able to achieve this speed. This implies that it’s theoretically impossible for anything with mass to travel at the speed of light as we currently understand it. However, this natural “speed limit” doesn’t stop sci-fi writers from taking creative liberties in their work. Things like warp drives, wormholes, and time travel all revolve around speculations on the true nature of light-speed and how humans can engineer machinery to mimic its behavior. With today’s technology these ideas are obviously impossible, but does that mean humans will never achieve the seemingly impossible? With the current rate of technological innovation, inter-galactic space travel might not be as far off as we think. In only the past 100 years, humans have created marvels like the rocket ship, internet, and computer chip. Who’s to say where civilization will be in a couple hundred years from now? You and I probably won’t be around to see the first human reach a different solar system, but in a few centuries reaching the speed of light might not be seen as such an unattainable feat.