363 lecture 27-2008, oil palm and soybeans

363 lecture 27-2008, oil palm and soybeans - Scientists...

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Unformatted text preview: Scientists Find Oldest Human Samples Uncovered in the Americas Discovery Raises Questions About Theory of How Land Mass Was Populated 4/3/08 Scientists have found and dated the oldest human remains ever uncovered in the Americas -- a discovery that places people genetically similar to Native Americans in Oregon more than 14,000 years ago. Working with radiocarbon dating and DNA analysis, an international team concluded that fossilized feces found five feet below the surface of an arid cave are almost 1,000 years older than any previous human remains unearthed in the Americas. The samples were discovered close to a crude dart or spear tip chiseled from obsidian, as well as bones of horses and camels that were then common in the region. The researchers described their finding as a "smoking gun" in the long-running debate over when and where humans first inhabited the New World. The discovery, published today in the online edition of the journal Science, is a blow to the widely-held theory that the Clovis culture -- named after a site in New Mexico where its distinct artifacts and fluted spearheads were first identified in the 1930s -- was the first human presence in North America. Jenkins said that while the human DNA found in Oregon could be from ancestors of the Clovis culture, none of the distinctive Clovis-era technology has been found in the region. Mountain gorilla groups usually consist of a silverback male, several adult females, and many youngsters. Males backs turn silver at age 12. Mountain gorillas in the Congo N = approximately 150 8 were killed in 2007 About 750 in the world Uganda 350 Rwanda 270 Congo 150 Poaching, disease, habitat loss, war >150 park rangers killed since 1994 when the civil war began Goma, in eastern Congo, with the Nyiragongo volcano. Virunga National Park is nearby. July 2007 a male and three females were killed in Virunga National Park Silverback Rugendo and much of his family was killed in July 2007. Villagers carried him 3 hours for burial. Ecotourism and gorillas Volcanoes National Park in Rwanda $500 for a one-hour visit A year-long waiting list $8 million/year from entrance fees, much more from hotel, travel, food costs Gorilla population has increased 17% since 1989 A saiga calf stands next to its mother. Hunting has already endangered the saiga, an odd-looking, big-nosed antelope that lives in central Asia. Now, a study by the the Wildlife Conservation Society finds that a narrow, three-mile-wide migration route that connects two populations of saigas is now in danger of becoming blocked by herds of livestock, trucks and motorcycles. Tibetan Antelope ( Pantholopos hodgsonii ) Conservation Situation Decline from 1,000,000 to less than 75,000 since 1990s....
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This note was uploaded on 10/22/2008 for the course BSCI 363 taught by Professor Staff during the Spring '08 term at Maryland.

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363 lecture 27-2008, oil palm and soybeans - Scientists...

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