Stonehenge Glacier Transport: This illustration shows an alternate theory to how Stonehenge arrived at its present location. Some geologists now believe that glaciers, not humans, carried the massive stones long distances to where Stonehenge itself was finally constructed.
Early Earth: A dim sun shines through haze, with volcanoes in the background and the ocean lapping against mats of organisms called stromalites, in this view of what Earth likely looked like billions of years ago. In the early days of Earth the sun was too dim to keep the planet warm. And yet, evidence shows vast, unfrozen oeans existed when temperatures should have been below freezing.  
Asteroid Extinction: The asteroid credited with killing the dinosaurs sent off a long series of cataclysmic events: volcanic eruptions, tsunamis, droughts and death. 
Nearly 35 million years ago a meteor or asteroid crashed into the Chesapeake Bay on the east coast of the United States creating a 12 mile wide crater. At this time early mammals roamed the Earth and the mid-Atlantic coast had a tropical climate and vegetation.
Parting of the Red Sea, Scientific Theory: This illustration shows how a strong wind from the east could push back waters from two ancient basins--a lagoon (left) and a river (right)--to create a temporary land bridge. New research suggests that such a physical process could have led to a parting of waters similar to the description in the biblical account of the Red Sea.

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