Long before New York City was the Big Apple, or even New Amsterdam, a giant tsunami crashed ashore. Image Info: More than 2,300 years ago, a tsunami may have hit what is now New York City. The source of the giant wave, say geologists studying the sediments in nearby bodies of water, may have been a 330-foot-wide asteroid.
It was 2,300 years ago. The Palisades that frame the Hudson River were whisper-quiet, the sandy beaches of Long Island and New Jersey empty, and Manhattan was still just an unbroken sylvan carpet.
Then came the mammoth wave, roaring into the serenity. No one knows for sure what caused it, but new clues found in the Hudson's silt suggest an asteroid 100 meters (330 feet) in diameter slammed into the Atlantic Ocean nearby.