Are biological evolution and human history directed by a hierarchy of Intelligences, the lowest level of which makes physical contact with mankind? Do invisible guardians of this planet "see…Full description
Introduction and scopeFull description
Descripción: The History of VTOL
Redacted and declassified history of the w54 nuclear warhead.
A book review of Agoncillo's The Revolt of the Masses.Full description
Agriculture—that is, using and managing natural resources—has a long and complex history. For thousands of years, societies have relied on plants and animals for food and other items, making…Descrição completa
