IMMANUEL VELIKOVSKY
His books primarily used comparative mythology and ancient literary sources to propose that the Earth had suffered catastrophic close-contacts with other planets in the solar system, during and before recorded history.
ALAN F. ALFORD
Author of books covering ancient mythology, mysticism and the origin of world religions.
ZECHARIA SITCHIN
Author of 'The 12th Planet' and several other books in the Earth Chronicles series.
DAVID DEUTSCH
Author of 'The Fabric of Reality' known for his controversial 'Multiverse Hypothesis'.
ERICH VON DANIKEN
The father of the 'Ancient Astronaut Theory'. He supports the hypothesis that human evolution may have been manipulated by means of genetic engineering by extraterrestrial beings.