Cambrian biological explosion, the biggest life mystery in science today ---- More than 500 million years ago, single-celled life on Earth suddenly underwent a mutation-like evolution, and all kinds of splendid creatures were "born out of thin air "born, the ancestors of all present-day species appeared in that brief period, each species evolved at the speed of light billions of times faster than now, it was a splendid era. Unfortunately, splendid things are always short-lived, and after the short "Cambrian" period, life on Earth entered another 500 to 600 million years of turtle evolution. And mankind, also in the turtle race half a beat faster than others, became the best of the Earth's life. But now - the even greater "second era" has come again. The speed of light evolution, human beings in the shortest possible time from the throne of the food chain was pulled down, the Earth's life, ushered in a second gorgeous explosion. The real doomsday, no longer brainless zombies and desolate earth, but - the end of mankind, the whole earth's paradise!