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[ Watch the Video ] Many parts of the ocean are better understood than some of the Earth's large lakes, despite the fact that these are key reservoirs for much of the fresh water on the planet. Since 1994, scientists at the Large Lakes Observatory (LLO) have been working to change that. With support from the National Science Foundation (NSF), LLO scientists study the biology, chemistry, physics and geology of large lakes around the world. "As I started doing work in Lake Superior, I...
- The navel or umbilicus.
- In Greek archaeology: A central boss, as on a shield, a bowl, etc.
- A sacred stone in the temple of Apollo at Delphi, believed by the Greeks to mark the 'navel' or exact center-point of the earth.