An oyster oddity: In 1954, Northwestern University biologist Frank A. Brown collected 15 oysters from the Connecticut shore and shipped them by train to Evanston, Ill. There he put them in a temperature-controlled tank in a dark room and observed them for 46 days.

The oysters opened their shells twice a day, presumably for feeding, at the time of the high tide in their home beds in Long Island Sound. After two weeks, though, their timing shifted to follow the local tides in Evanston.

Apparently they had recalibrated using the moon.