Abstract
Humans, being surface-dwelling creatures, not surprisingly have tended to focus the search for extraterrestrial life on the exterior of planets and moons. But discoveries of deep-sea microbial colonies that thrive solely on chemical energy from hydrothermal vents, combined with the exciting possibility that a liquid water ocean may lie under the surface of the jovian moon Europa, are leading many scientists to rethink that strategy. At the annual meeting of the American Association for the Advancement of Science (AAAS) held in Seattle last month, space scientists joined forces with terrestrial geologists and biologists to promote the search for otherworldly microbes down under instead of up top. During a symposium on submarine volcanoes, chemosynthetic life, and mineral deposit formation, University of Washington, Seattle, geology professor John R. Delaney postulated that within the next generation or so, extraterrestrial life may be discovered thriving in warm, liquid, subsurface communities. It's not g...
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