Sure! The reason we can't travel faster than the speed of light is because of a fundamental concept in physics known as "special relativity," proposed by Albert Einstein.
In the theory of special relativity, Einstein showed that the speed of light, denoted by "c," is an absolute constant in the universe. This means that no matter how fast you are moving or how fast the light source is moving relative to you, the speed of light in a vacuum will always be the same. Its value is about 299,792,458 meters per second (approximately 186,282 miles per second).
Now, the theory also tells us that as objects with mass (like us, cars, planets, etc.) accelerate and get closer to the speed of light, they become heavier and require more and more energy to keep accelerating. The closer they get to the speed of light, the more their mass increases, and the more energy is needed to speed them up further. At the speed of light, an object's mass would become infinite, and to go beyond that would require an infinite amount of energy, which is physically impossible.
So, the speed of light acts as a cosmic speed limit, preventing anything with mass from reaching or exceeding it. This is why, according to our current understanding of physics, traveling faster than the speed of light is simply not possible. It's a fundamental limitation of the universe as described by the theory of special relativity.