28 years later, no one has managed to give an explanation to what or who issued this signal. The radiation came from the direction of Sagittarius, and a scope of unos1420 megahertz frequency. These frequencies are part of the radio spectrum in which all kinds of transmission is prohibited by an international agreement. The nearest estella in that direction is approximately 220 light years, so if the signal came from there, he had to cause either an astronomical event of enormous power. Or perhaps was an alien civilization with a high power transmitter? 12. Not so constant constants in 1997 the astronomer John Webb and his team from the University of Sydney analysed the light that came to Earth from distant quasars. On his journey of 1,200 million light-years, the light He had gone through interstellar clouds of materials such as iron, nickel or chrome, and researchers found that the atoms had absorbed part of the photons of light from quasars, but those who had not expected.

If the observations are correct, the only vaguely reasonable explanation is that you a constant of physics, called the fine structure constant or alpha value changes when it passes through these interstellar clouds. Scientists are still investigating. 13. The melting cold in 1989 two researchers from the University of Utah (United States), Martin Fleischmann and Stanley Pons, triggered nuclear fusion in a test tube. They argued that it was possible to carry out processes of cold fusion using a metal block of Palladium as a catalyst. In the following 10 years, thousands were scientists who tried to achieve the same results, but without success. Still today continues the controversy, although there are many who argue that the results of Fleischmann and Pons It was result of an experimental error.