Event in women's gymnastics in which a pair of wooden bars supported horizontally above the floor at different heights is used to perform acrobatic feats. The apparatus allows a great variety of movements, but hanging and swinging exercises predominate. It became an Olympic event in 1936. Seealso parallel bars.
Learn more about uneven parallel bars with a free trial on Britannica.com.
Evolution of geographically separated groups in such a way that they show physical resemblances. A notable example is the similarity between the marsupial mammals of Australia and placental mammals elsewhere, which have arrived at remarkably similar forms through the separate courses of their evolution.
Learn more about parallel evolution with a free trial on Britannica.com.
Paul Hamm (U.S.) competing on the parallel bars during the 2004 Olympic Games in Athens.
Learn more about parallel bars with a free trial on Britannica.com.