Columbia University's research ship Vema steamed back into New York Harbor last week with new information about the "rivers" that flow on the bottom of the ocean. About 600 miles east of Philadelphia, where the Atlantic is 17,000 ft. deep, the Vema's sensitive sounding apparatus found a steep-walled canyon two or three miles wide and about 180 ft. deep. The scientists followed it for 100 miles and they have reason to believe that it may run for 500 miles across the bottom of the ocean (see map).
This discovery was no surprise to Bruce C. Heezen of Lament Geological Observatory, the Vema's...
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