The Velikovsky Heresies: Worlds in Collision and Ancient Catastrophes Revisited by Laird Scranton

Author:Laird Scranton [Scranton, Laird]
Language: eng
Format: epub
Published: 2016-01-17T16:00:00+00:00

Another source commented on the importance of the impact model for understanding the history of Mars.

“This impact is really one of the defining events in Mars’ history,” said MIT postdoctoral researcher Jeffrey Andrews-Hanna, who led the new study with MIT geophysicist Maria Zuber and NASA Jet Propulsion Laboratory researcher Bruce Banerdt. By combining detailed topographical data from the Mars Global Surveyor mission with measurements of the variations in the planet’s gravitational field made by the Mars Reconnaissance Orbiter satellite, Andrews-Hanna and his team assembled a map of the Martian surface before volcanic eruptions added layers and obscured the boundary between the hemispheres. The map revealed a stunning elliptical basin shape covering about 40 percent of Mars’ surface. “This was a kind of surprising result,” Andrews-Hanna said. “What we noticed is that the dichotomy boundary around the planet was actually smooth and regular. We tested to see if we could fit this with any shape, and it just so happens that it’s almost perfectly fitted by an ellipse. There’s only one process that’s known to make an elliptical depression like that, and that’s a giant impact.”²

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