You'll be hard pressed to come up with a Pathfinder-related question this site doesn't answer. There's information on all the Pathfinder team members, a directory of Pathfinder scientific results (geology, minerology, atmospherics…), news archives, image archives—even a fiction piece called "The Story of a Little Rock on Mars." Click on "Live from Mars" for educational materials and deep background on all things Mars.
This award-winning site opens with the sound of underwater bubbles as it immerses you in the Sea of Cortés. Here your class can further explore the underwater geysers called hydrothermal vents and the peculiar creatures—lipstick-like tubeworms, ghostly vent crabs, the "hottest" animal on Earth, to name a few—who live there. Learn about the vents' toxic chemistry and what it may tell us about life here and on other planets, and meet the Alvin's crew and find out which high-tech tools help them probe the deep. You'll find classroom activities and links too.
Dive and Discover
Join scientists on underwater expeditions to the Gulf of California, the eastern Pacific Rise south of Mexico, the Indian Ocean, and other deep-sea locales. At this absorbing, informative site, sponsored by the Woods Hole Oceanographic Institution and the National Science Foundation, you and your students can read daily journals by expedition crews, covering everything from seafloor photography to day-to-day life on a sub (including hotly competitive ping-pong matches!). There are also plenty of informative articles on seafloor gravity, underwater volcanoes, and many other topics.
Mars Pathfinder