Artificial+bitumen
51Transparent slate — Slate Slate (sl[=a]t), n. [OE. slat, sclat, OF. esclat a shiver, splinter, F. [ e]clat, fr. OF. esclater to shiver, to chip, F. [ e]clater, fr. OHG. sleizen to tear, slit, split, fr. sl[=i]zan to slit, G. schleissen. See {Slit}, v. t., and cf.… …
52Lake Pedder — Infobox lake lake name = Lake Pedder image lake = Lake pedder small.jpg caption lake = Original Lake Pedder, 1970 image bathymetry = caption bathymetry = location = Tasmania coords = coord|42|56|S|146|08|E|region:AU… …
53Artículos sobre el medio ambiente — Anexo:Artículos sobre el medio ambiente Saltar a navegación, búsqueda Plantilla:Listas Contenido 1 A 2 B 3 C 4 D …
54Edad de Piedra — Saltar a navegación, búsqueda La Edad de Piedra[1] es el período de la Prehistoria durante el cual, los seres humanos crearon herramientas de piedra debido a la carencia de una …
55photography, history of — Introduction method of recording the image of an object through the action of light, or related radiation, on a light sensitive material. The word, derived from the Greek photos (“light”) and graphein (“to draw”), was first used in the… …
56Brick — For other uses, see Brick (disambiguation). An old brick wall in English bond laid with alternating courses of headers and stretchers …
57Concrete — This article is about the construction material. For other uses, see Concrete (disambiguation). Outer view of the Roman Pantheon, still the largest unreinforced solid concrete dome.[1] …
58Greek fire — was a burning liquid weapon used by the Byzantine Empire. The Byzantines typically used it in naval battles to great effect as it could continue burning even on water. It was largely responsible for many Byzantine military victories, and partly… …
59Radioactive waste — 2007 ISO radioactivity danger logo, designed in part for long term radioactive waste depositories which might survive into a far future time in which all knowledge of the meaning of present common radiation danger symbols and signs has been lost… …
60Fossil fuel — Coal, one of the fossil fuels. Fossil fuels are fuels formed by natural processes such as anaerobic decomposition of buried dead organisms. The age of the organisms and their resulting fossil fuels is typically millions of years, and sometimes… …
