Because of its rapid loss of genes over the past 300 million years, scientists have predicted that the Y chromosome may disappear altogether. However, recent studies have shown that the decay may have reached a halt.
Yale Psychology Professors Allan Wagner and Susan Holen-Noeksema were given lifetime achievement awards from the APS. The former was recognized for his research on the mechanisms of associative learning, the latter for her work on mood disorders and regulation.
Population is measured by statistics, marked by numbers. Demographics can be plotted on number-based pyramids, and growth can be charted on line graphs tracing births