The English theologian George Hawkins Pember, in his 1876 masterpiece, Earth’s Earliest Ages, analysed the prophecy of Jesus Christ that says the end times would be a repeat of “the days of Noah.” Pember outlined the seven great causes of the antediluvian destruction and documented their developmental beginnings in his lifetime. The seventh and most fearful sign, Pember wrote, would be the return of the spirits of Nephilim, “the appearance upon earth of beings from the Principality of the Air, and their unlawful intercourse with the human race.” Jesus Himself, in answering His disciples concerning the signs of His coming...