http://www.nytimes.com/2006/11/14/science/14WAVE.html?ex=1321160400&en=35b395ffd080eb47&ei=5090&partner=rssuserland&emc=rss

At the southern end of Madagascar lie four enormous wedge-shaped sediment deposits, called chevrons, that are composed of material from the ocean floor. Each covers twice the area of Manhattan with sediment as deep as the Chrysler Building is high.

On close inspection, the chevron deposits contain deep ocean microfossils that are fused with a medley of metals typically formed by cosmic impacts. And all of them point in the same direction — toward the middle of the Indian Ocean where a newly discovered crater, 18 miles in diameter, lies 12,500 feet below the surface.

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When the chevrons all point in the same direction to open water, Dallas Abbott, an adjunct research scientist at Lamont-Doherty Earth Observatory in Palisades, N.Y., uses a different satellite technology to look for oceanic craters. With increasing frequency, she finds them, including an especially large one dating back 4,800 years.
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Dr. Masse analyzed 175 flood myths from around the world, and tried to relate them to known and accurately dated natural events like solar eclipses and volcanic eruptions. Among other evidence, he said, 14 flood myths specifically mention a full solar eclipse, which could have been the one that occurred in May 2807 B.C.
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That’s Leif, Erik’s son. Brought to you by the Department of Redundancy Department.

LOL. Only…you didn’t notice my name. My father isn’t “Lars”. Patronymics are very rare these days. (Sure, you can argue that it wasn’t then. But then it’s no longer redundancy you are arguing, but history.)

Since their civilization was around for many thousands of years, it is almost certain that at least one of them witnessed the fireball from a meteorite that reached the ground.