According to our current understanding of physics, everything in the universe, including particles, objects, and information, must travel at speeds equal to or less than the speed of light in a vacuum. The speed of light in a vacuum, denoted by the symbol "c," is approximately 299,792,458 meters per second.
This fundamental principle is derived from Albert Einstein's theory of relativity, which has been extensively tested and verified through experimental observations. The theory of relativity establishes that the speed of light in a vacuum is an absolute constant and represents the maximum attainable speed in the universe.
One of the key consequences of this theory is that as an object with mass accelerates, its energy and momentum increase, and as the object approaches the speed of light, the energy required to further accelerate it becomes infinitely large. This implies that it would require an infinite amount of energy to reach or exceed the speed of light.
Therefore, based on our current understanding, all particles, objects, and information must abide by this cosmic speed limit and travel at speeds less than or equal to the speed of light.