Gary Gilligan (1957- ) is an English author who has “studied Egyptology, Astronomy and Geology with an almost obsessive passion. When he first came across the theory of catastrophism, he was intrigued by the possibility that the Solar System had undergone recent upheavals due to cosmic chaos.”
Gilligan is arguably the most radical of the catastrophists and ancient chronology revisionists publishing today. Some of his ideas make those of Velikovsky as well as James and Rohl seem somewhat tame.
Among his many extreme claims are (1) Our Moon was only captured in the first millennium BC(a), (2) The Saharan sands, he claims are extraterrestrial in origin, (3) The ancient year had only 360 days(b) and (4) The ancient Egyptian climate was milder than today as indicated by a red sun, rather than today’s yellow disk!(c)