isolated pole
71Tree line — The tree line or timberline is the edge of the habitat at which trees are capable of growing. Beyond the tree line, they are unable to grow because of inappropriate environmental conditions (usually cold temperatures, insufficient air pressure,… …
72Northern Sea Route — A graphical comparison between the North East Passage (blue) and an alternative route through Suez Canal (red) The Northern Sea Route (Russian: Северный морской путь, Severnyy morskoy put’, shortened to Sevmorput ) is a shipping lane officially… …
73Carsten Borchgrevink — Infobox person name = Carsten Egeborg Borchgrevink image size = 200px name = Carsten Egeborg Borchgrevink birth date = birth date|1864|12|1 birth place = Oslo, Norway death date = death date and age|1934|4|21|1864|12|1 death place = Oslo, Norway… …
74cluster — clusteringly, adv. clustery, adj. /klus teuhr/, n. 1. a number of things of the same kind, growing or held together; a bunch: a cluster of grapes. 2. a group of things or persons close together: There was a cluster of tourists at the gate. 3. U.S …
75Native American art — ▪ visual arts Introduction also called Indian art or American Indian art the visual art of the aboriginal inhabitants of the Americas, often called American Indians. For a further discussion of the visual art of the Americas produced in …
76Peary, Robert Edwin — ▪ American explorer born May 6, 1856, Cresson, Pa., U.S. died Feb. 20, 1920, Washington, D.C. U.S. Arctic explorer usually credited with leading the first expedition to reach the North Pole (1909). Peary entered the U.S. Navy in 1881 and… …
77McClure Arctic Expedition — Map drawn by Robert McClure detailing the Northwest Passage, including the 1851 route of the Investigator. The McClure Arctic Expedition of 1850, among numerous British search efforts to determine the fate of the Franklin s lost expedition, is… …
78climate — /kluy mit/, n. 1. the composite or generally prevailing weather conditions of a region, as temperature, air pressure, humidity, precipitation, sunshine, cloudiness, and winds, throughout the year, averaged over a series of years. 2. a region or… …
79Passive solar building design — Elements of passive solar design, shown in a direct gain application …
80Physical Sciences — ▪ 2009 Introduction Scientists discovered a new family of superconducting materials and obtained unique images of individual hydrogen atoms and of a multiple exoplanet system. Europe completed the Large Hadron Collider, and China and India took… …
