Steve Zack is coordinator of Bird Conservation for the Wildlife Conservation Society (WCS). Thanksgiving is upon us, as families and friends gather for food, drink and conversation.

An air-filled sac within the birds' lungs is believed to increase the force the birds use to power flight muscles while soaring. Soaring birds -- like osprey, eagles, falcons, even vultures -- can ...

New theory on origin of birds: Enlarged skeletal muscles Date: July 2, 2011 ... Dr. Newman, a professor of cell biology and anatomy, studies the diversity of life and how it got that way.

The Fundus Oculi of Birds, especially as viewed by the Ophthalmoscope: A Study in Comparative Anatomy and Physiology. By Casey A. Wood. Pp. 180 + plates lxi. (Chicago: The Lakeside Press, 1917.) ...

The trouble was that most biologists do not describe animal anatomy in engineering-friendly terms. ... But with a five-jointed muscle network, a bird does not have to signal each muscle independently.

Thanksgiving is upon us, as families and friends gather for food, drink and conversation. The latter can be fraught with risk, of course — politics and religion have long been out of the question, and ...