The fastest speed in the universe can reach the speed of light, the current technology of human beings can not reach the speed of light, nor can it exceed the speed of light, through the physical technology can be known to be accelerated particles, human beings in order to study the origins of the universe and the composition of the matter, began to research and develop the particle gas pedal, has been able to accelerate the very small particles to close to the speed of light. Through continuous deduction and research, if you want to accelerate particles to the speed of light level, the energy required is infinite, the premise is that the mass of these particles almost to zero can, so according to the current level of technology to achieve the maximum speed can be close to the speed of light, and the known speed of light is very close to the fastest to reach the speed of light of 99.999%, this is the world's largest particle collider! Located in the European Nuclear Center's large particle collider accelerated protons, that is, the hydrogen nucleus acceleration can reach such a speed, which is the current level of science and technology can be accelerated to the maximum speed of particles. Want to accelerate particles to a greater speed requires more energy, but also need to constantly reduce the mass of particles, according to special relativity can be calculated, when the proton reaches 99% of the speed of light when the energy required for 450 GeV, if you want to reach 99.99999% times the speed of light, I need the energy directly to 7000 GeV, just a little bit more than the quality of the energy required to multiply the growth of the energy, so the technology level can accelerate particles to the maximum speed. The energy required for just a little bit more mass grows exponentially, so according to the modern level of science and technology, not taking into account the photons in the photon collider, then the speed that can be achieved is 299792457.9964 meters per second. So no matter how hard and innovative it is not possible to reach the speed of light, because the speed of light needs to be reached in a special medium, and in the real environment, both particle gas pedals and particle colliders, the energy provided is not enough to reach the speed of light, because in a particle with a non-zero mass, such as protons and atoms, the energy needed to reach the speed of light is infinite, and it is obviously not possible in real life. Real life is obviously impossible, before the United States of America's linear gas pedal can accelerate electrons to 99.999995% of the speed of light, but only to get a breakthrough and can not realize the speed of light.