It is not ruled out that aliens are related to some strange phenomena discovered in space, ROKOSes are among them. Scientists know 80 objects called ROKOS (radio-objects with the continuous light-spectrum): their sizes are comparable with the size of stars, but one peculiarity of the objects suggests that they are not natural. ROKOSes have no absorption lines, marks of atoms of chemical substances, typical of all other stars. This fact suggests a really fantastic idea to researchers that probably ROKOSes are beacons which ancient intelligent space explorers mounted for their own purposes or to attract creatures of other civilizations.

The solar system also provides several suggestions why extraterrestrial civilizations may actually exist. There are several hypotheses saying that the solar system underwent the impact of aliens. The abnormal structure of the system, which is not yet explained, makes researchers suppose it was made artificially. Sergey Yazev from the Special Astrophysical Observatory says that a couple of decades ago only a researcher absolutely neglecting his reputation could state that aliens transformed the solar system structure. But today we have some really substantial facts to suppose so, the expert adds.

Head of a laboratory of the planetary physics department at the Russian Academy of Sciences Institute for Space Exploration, Leonid Ksanfomaliti, says that the basic principle of all known planetary systems is that the biggest planet is the closest to the sun. But as for our planetary system, small Mercury is the closest planet to the sun. This suggests that the solar system was probably transformed by aliens. Researchers also doubt that huge Jupiter could get formed in the remotest orbit without anyone's assistance.

http://english.pravda.ru/science/19/94/377/16288_universe.html