Stephen Hawking
Brian Greene
Zecharia Sitchin
Diodorus Siculus
Carl Sagan
Otto Struve
Robert Graves
Thomas Burnet
James Hopwood Jeans
Michio Kaku
Leonard Susskind
Immanuel Kant
John H. Walton
Ernst Heinrich Philipp August Haeckel
W. Robertson Smith
Thomas Nagel
George Smith
Lewis Spence
Dennis Overbye