title: The origin and evolution and comparative physiology of gravity sensing organs.
abstract: This introduction to the Topical Meeting on Gravity Sensing Organs specifically addresses the topic's specific descriptors:  origin, evolution, and comparative physiology.
authors.affiliation: University of Pennsylvania, Department of Biology, Philadelphia 19104, USA.
authors.forename: A H
authors.initials: AH
authors.lastname: Brown
mesh_terms: D000818:Animals; D005075:Biological Evolution; D005580:Fossils; D006112:Gravitation; D018466:Gravity Sensing / Q000502:physiology*; D018472:Hypogravity; D010163:Paleontology; D010828:Physiology, Comparative; D010944:Plants