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Leidy, Joseph
(Encyclopedia)Leidy, Joseph līˈdē [key], 1823–91, American scientist, b. Philadelphia, grad. Univ. of Pennsylvania medical school. From 1853 he taught anatomy at his alma mater. He was also professor of natura...monkey-puzzle tree
(Encyclopedia)monkey-puzzle tree, evergreen tree (Araucaria araucana) native to Chile and widely cultivated elsewhere as an ornamental. The symmetrical branches have an unusual angularity and are completely covered...Piltdown man
(Encyclopedia)Piltdown man, name given to human remains found during excavations (1908–15) at Piltdown, Sussex, England, by Charles Dawson. The find led to much speculation and argument. Since they were found wit...ginkgo
(Encyclopedia)ginkgo gĭngˈkō [key] or maidenhair tree, tall, slender, picturesque deciduous tree (Ginkgo biloba) with fan-shaped leaves. The ginkgo is native to E China, where it was revered by Buddhist monks an...Hagerman Fossil Beds National Monument
(Encyclopedia)Hagerman Fossil Beds National Monument: see National Parks and Monuments (table)national parks and monuments (table). ...Florissant Fossil Beds National Monument
(Encyclopedia)Florissant Fossil Beds National Monument: see National Parks and Monuments (table)national parks and monuments (table). ...Agate Fossil Beds National Monument
(Encyclopedia)Agate Fossil Beds National Monument: see National Parks and Monuments (table)national parks and monuments (table). ...shale
(Encyclopedia)shale, sedimentary rock formed by the consolidation of mud or clay, having the property of splitting into thin layers parallel to its bedding planes. Shale tends to be fissile, i.e., it tends to split...Text of the Constitution of the United States
(Encyclopedia)Text1 of the Constitution of the United States Preamble Article I Article II Article III Article IV Article V Article VI Article VII Amendment I Amendment II Am...Old Red Sandstone
(Encyclopedia)Old Red Sandstone, series of red and brown sandstones, conglomerates, and shales deposited in Wales and Scotland and in England near the Welsh and Scottish borders in the Devonian period of geologic t...Browse by Subject
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