median period of survival
21environment — environmental, adj. environmentally, adv. /en vuy reuhn meuhnt, vuy euhrn /, n. 1. the aggregate of surrounding things, conditions, or influences; surroundings; milieu. 2. Ecol. the air, water, minerals, organisms, and all other external factors… …
22United States — a republic in the N Western Hemisphere comprising 48 conterminous states, the District of Columbia, and Alaska in North America, and Hawaii in the N Pacific. 267,954,767; conterminous United States, 3,022,387 sq. mi. (7,827,982 sq. km); with… …
23Ant — For other uses, see Ant (disambiguation). Ants Temporal range: 130–0 Ma …
24Menopause — Change of Life redirects here. For the Eureka Seven episode, see Change of Life (Eureka Seven). For the Goodies episode, see Change of Life (The Goodies). Menopause Classification and external resources ICD 10 N95.0 ICD 9 …
25nervous system, human — ▪ anatomy Introduction system that conducts stimuli from sensory receptors to the brain and spinal cord and that conducts impulses back to other parts of the body. As with other higher vertebrates, the human nervous system has two main… …
26History of Afghanistan — Timeline …
27Vermont — This article is about the U.S. state of Vermont. For other uses, see Vermont (disambiguation). State of Vermont …
28Cheney, Washington —   City   Location of Cheney, Washington …
29Socialized medicine — is a term used to describe a system for providing medical and hospital care for all at a nominal cost by means of government regulation of health services and subsidies derived from taxation.[1] It is used primarily and usually pejoratively in… …
30History of Iran — see also Kings of Persia · Timeline of Iran Antiquity …
