We've mapped the surface of Mars in more detail than the bottom of our own oceans. Over 80% of the seafloor remains unexplored, and the creatures that live down there make science fiction look ...
AMONG a dozen specimens of the planarian, Polycelis cornuta Johnson, collected in August 1931 from a small pond at Liss in Hampshire, I observed one specimen with a well-developed double pharynx. I ...
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