One day in 1951, when Nobel Laureate and physicist Fermi was discussing the issue of flying saucers and aliens with others, he suddenly said: “Where…

Another intelligent species left a trace? 　　With the help of space probes, we have learned about many planets and moons in the solar system, but…

“Planet Nine” is actually a black hole? 　　In the outer solar system, in the space beyond Pluto, there is a vast wilderness. Most astronomers believe…

　　The dragon is an imaginary animal, but in history it has appeared in the myths and legends of many peoples, especially we Chinese, who also…

　　We all cherish ourselves very much, for fear that the emotional pay is too much, too fast and too obvious, and we die of premature…