(Encyclopedia) podzolpodzolpŏdˈsŏl [key] or podzolic soil, member of a group of soils that are gray in color, have an ashy appearance, and extend immediately south of the tundra regions of the…
(Encyclopedia) narwhalnarwhalnärˈwəl [key], a small arctic whale, Monodon monoceros. The males of the species, and an occasional female, bear a single, tightly spiraled tusk that measures up to 9 ft…
(Encyclopedia) Thomson, James, 1700–1748, Scottish poet. Educated at Edinburgh, he went to London, took a post as tutor, and became acquainted with such literary celebrities as Gay, Arbuthnot, and…
(Encyclopedia) rhearhearēˈə [key], common name for a South American bird of the family Rheidae, which is related to the ostrich. Weighing from 44 to 55 lb (20–25 kg) and standing up to 60 in. (152 cm…
(Encyclopedia) tree shrew, small, arboreal mammal of the family Tupaiidae, found in S Asia. The 17 known species of tree shrews are classified as the order Tupaioidea or Scandentia. Tree shrews…
(Encyclopedia) spinal cord, the part of the nervous system occupying the hollow interior (vertebral canal) of the series of vertebrae that form the spinal column, technically known as the vertebral…
Have you visited any biomes lately? A biome is a large ecosystem where plants, animals, insects, and people live in a certain type of climate. If you were in northern Alaska, you would be in a…
Gyri and SulciAnatomy and PhysiologyThe Central and Peripheral Nervous SystemsYou've Got Some Nerve!Gyri and SulciThe Control CenterSensory and Motor ControlThalamus: The Switching StationSpinal…
