each of the density ranges is quite broad
1Beijing 2008 Olympic Games: Mount Olympus Meets the Middle Kingdom — Introduction officially Games of the XXIX Olympiad The Games of the XXIX Olympiad, involving some 200 Olympic committees and as many as 13,000 accredited athletes competing in 28 different sports, were auspiciously scheduled to begin at 8 …
2Colonization of the Moon — Lunar outpost redirects here. For NASA s plan to construct an outpost between 2012 and 2024, see Lunar outpost (NASA). Moonbase redirects here. For other uses, see Moonbase (disambiguation). 1986 artist concept The colonization of the Moon is the …
3Drolshagen — View of Drolshagen towards south from Papenberg (417 m). St. Clement s Church dominates the skyline …
4materials science — the study of the characteristics and uses of various materials, as glass, plastics, and metals. [1960 65] * * * Study of the properties of solid materials and how those properties are determined by the material s composition and structure, both… …
5Space Shuttle thermal protection system — The Space Shuttle thermal protection system (TPS) is the barrier that protects the Space Shuttle Orbiter during the searing 1650 °C (3000 °F) heat of atmospheric reentry. A secondary goal is to protect from the heat and cold of space while on… …
6Bongo (antelope) — The Bongo redirects here. For other uses, see Bongo (disambiguation). Western/Lowland Bongo Conservation status …
7Hayward Fault Zone — The Hayward Fault Zone is a geologic fault zone capable of generating significantly destructive earthquakes. About 60 kilometers long, it lies mainly along the western base of the hills on the east side of San Francisco Bay. It runs through… …
8Geology of solar terrestrial planets — The geology of solar terrestrial planet mainly deals with the geological aspects of four planets of the Solar system namely, Mercury, Venus, Earth and Mars and one terrestrial dwarf planet, Ceres. Objects like Pluto are similar to terrestrial… …
9Beijing city fortifications — The city wall of Beijing was a fortification built around 1435. It was 23.5 km long. The thickness at ground level was 20m and the top 12m. The wall was 15m high, and it had nine gates. This wall stood for nearly 530 years, but in 1965 it was… …
10San Fernando Valley — The San Fernando Valley or The Valley is an urbanized valley located in the north western section of the city of Los Angeles, California, United States.GeographyThe San Fernando Valley is convert|345|sqmi|km2|0 bounded by the Santa Susana… …
