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The Greenland-Scotland Ridge looms like a great undersea barrier, stretching from East Greenland to Iceland and the Faroe Islands, and across to Scotland. The Denmark Strait is a critical checkpoint through which cold, fresher waters from northern seas flow across the ridge into the the main body of the North Atlantic Ocean. (Illustration by E. Paul Oberlander, Woods Hole Oceanographic Institution)From USGS, who is now apparently in the climate business, because mapping and earthquakes are sooo 20th century.  New Discoveries Improve Climate ModelsUnderwater Ridges Impact Ocean’s Flow of Warm WaterNew discoveries on how underwater ridges impact the ocean’s circulation system...

The tantalising prospect of DVDs capable of holding almost a terabyte of data - or several hundred movies - has been presented in a patent issued to US storage company Iomega. The US patent describes a disc that could store 40 to 100 times more information that a conventional DVD, using more nanometre-scale sloped ridges to diffract light. US patent number 6879556 - entitled "Method and Apparatus for Optical Data Storage" - was issued to Iomega on April 12 2005. Conventional DVDs store information in the form of ridges and depressions, each several hundred nanometres wide. These correspond to bits...

Now for something somewhat different: From this page: The Lost City Hydrothermal Field From this site (also in the Source URL above) Lost City Expedition

Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2002 November 1 Europa's Freckles Credit: R. Pappalardo (U. Colorado) et al., Galileo Project, JPL, NASA Explanation: Europa, one of Jupiter's large Galilean moons, may well posses an ocean of liquid water hidden beneath its icy surface -- and so holds the tantalizing possibility of life. In this image, constructed with data recorded in 1996 and 1997 by the Galileo spacecraft, Europa's characteristic surface ridges and cracks are...

Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2002 October 1 Rectangular Ridges on Mars Credit: Malin Space Science Systems, MGS, JPL, NASA Explanation: What could cause rectangular ridges on Mars? As data flows in from the two spacecraft currently orbiting Mars, surface structures are seen that are not immediately understood. These structures pose puzzles that planetary geologists are eager to solve, as they might provide clues to past processes that have shaped Mars over billions...