excessive accumulation of body fat, usually caused by the consumption of more calories than the body can use. The excess calories are then stored as fat, or adipose tissue. Overweight, if moderate, is not necessarily obesity, particularly ...

glassy patch or streak on a relatively undisturbed ocean or lake surface, formed where surface tension is reduced by a monomolecular layer of organic matter produced by plankton or by man; closer to shore most of the material is man-made h...

Geneticist George David Snell's pioneering research on the immune system in the 1930s and 1940s enabled medical science to develop the process of organ transplantation. Through skin grafts performed on mice at the Jackson Hole Laboratory, ...