This companion book to Donnelly's Atlantis, the Antediluvian World, published one year later, is less well known today. Ragnarok is out of print except through specialty print-on-demand publishers, while Atlantis, the Antediluvian World is in print and fairly easy to obtain. Ragnarok, The Age of Fire and Gravel, proposes that a comet impacted the Earth several tens of thousands of years ago; the impact produced the 'Drift' layers of gravel which have been attributed to the Ice ages; this event destroyed a civilization which had high technology, a civilization which vanished completely except for some myths; the disaster was accompanied by catastrophic fire followed by years-long cloud cover and extreme cold. Humanity survived only by hiding in deep caves; when they re-emerged they had to restart civilization from scratch. Donnelly provides extensive geological, archeological, astronomical and mythological evidence for this theory. The book is not academic and often sensationalistic, but his populist style does not seem to detract from the argument.

This companion book to Donnelly's Atlantis, the Antediluvian World, published one year later, is less well known today. Ragnarok is out of print except through specialty print-on-demand publishers, while Atlantis, the Antediluvian World is in print and fairly easy to obtain. Ragnarok, The Age of Fire and Gravel, proposes that a comet impacted the Earth several tens of thousands of years ago; the impact produced the 'Drift' layers of gravel which have been attributed to the Ice ages; this event destroyed a civilization which had high technology, a civilization which vanished completely except for some myths; the disaster was accompanied by catastrophic fire followed by years-long cloud cover and extreme cold. Humanity survived only by hiding in deep caves; when they re-emerged they had to restart civilization from scratch. Donnelly provides extensive geological, archeological, astronomical and mythological evidence for this theory. The book is not academic and often sensationalistic, but his populist style does not seem to detract from the argument.

This companion book to Donnelly's Atlantis, the Antediluvian World, published one year later, is less well known today. Ragnarok is out of print except through specialty print-on-demand publishers, while Atlantis, the Antediluvian World is in print and fairly easy to obtain. Ragnarok, The Age of Fire and Gravel, proposes that a comet impacted the Earth several tens of thousands of years ago; the impact produced the 'Drift' layers of gravel which have been attributed to the Ice ages; this event destroyed a civilization which had high technology, a civilization which vanished completely except for some myths; the disaster was accompanied by catastrophic fire followed by years-long cloud cover and extreme cold. Humanity survived only by hiding in deep caves; when they re-emerged they had to restart civilization from scratch. Donnelly provides extensive geological, archeological, astronomical and mythological evidence for this theory. The book is not academic and often sensationalistic, but his populist style does not seem to detract from the argument.