The author's theories on earth science. Includes polar shift, ice ages, ancient climates, extinctions and more.

Hapgood's tour de force is back in print! This riveting account of how earth's poles have flipped positions many times is the culmination of Hapgood's extensive research of Antarctica, ancient maps and the geological record. This amazing book discusses the various pole shifts in earth's history -- occurring when earth's crust slips in the inner core -- and gives evidence for each one. It also predicts future pole shifts: a planetary alignment will cause the next one on 5 May 2000! Packed with illustrations, this book is the reference other books on the subject cite over and over again. With millennium madness in full swing, this is just the book to generate even more excitement at the unknown possibilities.

The outside layer of our planet is an active place. Earth's crust is always growing and changing. But do you know how Earth's crust forms? And what happens when its plates shift suddenly? Find out more about the moves that make mountains and ocean ridges in this interesting book!

Examines the Earth's surface, including how it changes and why it shifts, and describes the formation of mountains, volcanic eruptions, earthquakes, and the movement of continents.

Hapgood utilizes ancient maps as concrete evidence of an advanced worldwide civilization existing many thousands of years before ancient Egypt. Hapgood concluded that these ancient mapmakers were in some ways much more advanced in mapmaking than any people prior to the 18th century. Hapgood believes that they mapped all the continents. This would mean that the Americas were mapped thousands of years before Columbus. Antarctica would have been mapped when its coasts were free of ice. Hapgood supposes that there is evidence that these people must have lived when the Ice Age had not yet ended in the Northern Hemisphere and when Alaska was still connected with Siberia by the Pleistocene, Ice Age 'land bridge'.

The fascinating truth about Atlantis leads to a chilling conclusion about the environmental catastrophe that destroyed it. Now you can find out how the forces that shattered the first great civilization on Earth can happen again, bringing the end of the world to us all! With an Introduction by Colin Wilson. Martin's Press.

Scientific and mythological evidence that Antarctica was once Atlantis • Reveals how the earth’s crust shifted in 9600 BCE, dragging Atlantis into the polar zone beneath miles of Antarctic ice • Examines ancient yet highly accurate maps, including the Piri Reis map of 1513, which reveals a pre-glacial Antarctica • Shows how myths of floods and disaster from around the world all point to a common source In this completely revised and expanded edition of When the Sky Fell, Rand and Rose Flem-Ath show that 12,000 years ago vast areas of Antarctica were free from ice and home to the kingdom of Atlantis, a proposition that also elegantly solves the mysteries of ice ages and mass extinctions, the simultaneous worldwide rise of agriculture, and the source of devastating prehistoric climate change. Expanding upon Charles Hapgood’s theory of earth crust displacement, which was championed by Albert Einstein, they examine ancient yet highly accurate world maps, including the Piri Reis map of 1513, and show how the earth’s crust shifted in 9600 BCE, dragging Atlantis into the polar zone where it now lies beneath miles of Antarctic ice. From the Cherokee, Haida, and Okanagan of North America to the earliest records of Egypt, Iran, Mexico, and Japan, they reveal that ancient myths of floods, lost island paradises, and visits from advanced godlike peoples from all corners of the globe all point to the same worldwide catastrophe that resulted in Atlantis’s demise. The authors explain how the remaining Atlanteans, amid massive earthquakes and epic floods, evacuated and spread throughout the world, resulting in the birth of the first known civilizations. Including rare material from the archives of Charles Hapgood, Albert Einstein, and Dwight D. Eisenhower, the Flem-Aths explain how an earth crust displacement could happen again in the future, perhaps in correspondence with high solar activity. With new scientific, genetic, and linguistic evidence in support of Antarctica as the location of long-lost Atlantis, this updated edition convincingly shows that Atlantis was not swallowed by the sea but was entombed beneath miles of polar ice.

Elastic Waves in the Earth provides information on the relationship between seismology and geophysics and their general aspects. The book offers elastodynamic equations and derivative equations that can be used in the propagation of elastic waves. It also covers major topics in detail, such as the fundamentals of elastodynamics; the Lamb's problem, which includes the Cagniard-de Hoop theory; rays and modes in a radially inhomogeneous earth and in multilayered media, which includes the Thomson-Haskell theory; the elastic wave dissipation; the seismic source and noise; and the seismographs. The book consists of 33 chapters. The first 16 chapters include basic material related to the propagation of elastic waves. Topics covered by these chapters include scalars, vectors, and tensors in cartesian coordinates, stress and strain analysis, equations of elasticity and motion, plane waves, Rayleigh waves, plane-wave theory, and fluid-fluid and solid-solid interfaces. The second half of the book covers various ray and mode theories, elastic wave dissipation, and the observations and theories of seismic source and seismic noise. It concludes by discussing earthquake seismology and different seismographs, like the pendulum seismometer and the strain seismometer.