Theories of Erich Von Daniken
Many people question the existence of aliens and whether not they have ever visited our planet. Some major controversies have been argued over the years. None of these arguments are as famous as the theories and .
Methane, an indicator of life?
Methane (CH4) is an organic molecule present in gaseous form in the Earth's atmosphere. More than 90% of methane on our home planet is produced by living organisms. The recent detection of plumes of methane in .