(essay), "Another Basis for Life" (essay), "A Vision of the Past", "Zoological Retrogression" (essay), "On Extinction" (essay), "Life in the Abyss" (essay)...

and investigates their phenomena and causes. clinology The study of retrogression and decline in form and function in an animal or organism. clonology...

is true that in two respects the work of al-Khwarizmi represented a retrogression from that of Diophantus. First, it is on a far more elementary level...

returned from Sudan to South Africa in 1920, he observed that a depressing retrogression had occurred in terms of discipline, management and faunal preservation...

feet have three forward-facing toes; a hind toe is either higher and retrogressed, or absent. The back of the tarsus is covered with scales, the color...

unduly influenced by their husbands, and that it would lead to the retrogression of the race as women took on more "masculine" attributes. In fewer than...

Rheidae–Dromaiidae–Casuariidae clade (Aves, Palaeognathae, Ratitae)". Zoological Journal of the Linnean Society. 156 (3): 641–663. doi:10.1111/j.1096-3642...