HIDDEN DEPTHS.

The article discusses research by planetary scientist Kevin Hand of the Lost City, a region at the bottom of the Atlantic Ocean, and its ecosystem, which Hand believes could be replicated on moons such as Jupiter's Europa and Enceladus. Topics include astrobiologists' search for extraterrestrial life beyond Earth, the search for water on other planets and moons, and the Cassini probe's detection of organic compounds in a plume of ice particles and water vapour near Enceladus' south pole.