Woods Hole Oceanographic Institute (WHOI) provides this wonderful educational site about discovery and exploration of the deep seafloor. Dive and Discover "brings you right on board" oceanographic research cruises to the Pacific and Indian Oceans. The latest expedition, now underway, is Expedition 4 to the Central Indian Ridge where researchers are looking for new hydrothermal vent organisms. Visitors to Dive and Discover can read daily updates on research activity weather and view color photographs recently taken by the crew of Expedition 4. The "mail buoy" feature even allows folks to email questions to researchers on board the ship! This site gives detailed information about the physical and biological science of hydrothermal vents, oceanographic tools used in the expedition, and plate tectonics. Three past cruises -- to the Guaymas Basin, the East Pacific Rise, and the Galapagos -- are also featured, and the records of their daily logs, photos, etc. are housed here. This is a fabulous resource for science teachers of all levels.