There are probably dead animals in Earthʼs orbit. Before humans entered space in 1961, animals were sent into space to test whether future astronauts could survive the flight, and if so, how the flight might affect their health. Another fact that will surprise you - exist a planet of diamonds in Space! It was discovered in 2004. Research by scientists at Yale University suggests that the rocky planet 55 Cancri e, which has twice the radius of Earth and eight times the mass, may have a surface composed of graphite and diamond. Also, did you know that you can't cry in space? Because of weightlessness, tears cannot flow down, as on Earth. In space, astronauts grow by 5 centimeters, did you know this fact? Or this - Space is absolutely silent!