Physiology of dinosaurs and that this was a feature they shared with birds. In 2007 Oliver Wings reviewed references to gastroliths in scientific literature and found considerable confusion, starting with the lack of an agreed and objective definition of "gastrolith". He found that swallowed hard stones or grit can assist digestion in birds that mainly feed on grain but may not be essential—and that birds that eat insects in summer and grain in winter usually get rid of the stones and grit in summer. Gastroliths have often been described as important for sauropod dinosaurs, whose diet of vegetation required very thorough digestion, but
Andromeda Chained to the Rocks Andromeda Chained to the Rocks Andromeda Chained to the Rocks (1630) is a 34 x 25 oil on panel painting by the Dutch Golden Age painter Rembrandt. It is now in the Mauritshuis, The Hague, Netherlands. Andromeda represents Rembrandt's first full length mythological female nude history painting and is taken from a story in Ovid's "Metamorphoses". In Metamorphoses, Andromeda (mythology) is the daughter of an Ethiopian king and queen, Cepheus and Cassiopeia. Cassiopeia was very boastful about her beauty, and asserted that she was more beautiful than Juno, the queen of the gods and the Nereids. Insulted by Cassiopeia's assertions,