News tagged with africa
Humans may have helped the decline of African rainforests 3000 years ago
(PhysOrg.com) -- Large areas of rainforests in Central Africa mysteriously disappeared over three thousand years ago, to be replaced by savannas. The prevailing theory has been that the cause was a change ...
Ancient dinosaur nursery oldest nesting site yet found
An excavation at a site in South Africa has unearthed the 190-million-year-old dinosaur nesting site of the prosauropod dinosaur Massospondylusrevealing significant clues about the evolution of comple ...
Other Sciences / Archaeology & Fossils
Jan 23, 2012 |
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A toss of the dice reveals the truth
In a new study published in the Proceedings of the Royal Society B, researchers show how a simple toss of the dice can help to bring out honest answers when people are asked difficult questions.
Breeding with Neanderthals appears to have helped early humans fight disease
(PhysOrg.com) -- Following up on evidence that Homo Sapiens and Neanderthals mated and produced offspring, following the sequencing of the Neanderthal genome last year, Peter Parham, professor of microbiology ...
Prof disproves gene analysis that appeared to support out-of-Africa replacement model
(PhysOrg.com) -- In the sometimes opaque world of statistics, Alan R. Templeton, Ph.D., professor of biology in Arts & Sciences at Washington University in St. Louis, has found that it's good to know your ...
May 12, 2010 |
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Humans were once an endangered species
(PhysOrg.com) -- Scientists from the University of Utah in Salt Lake City in the U.S. have calculated that 1.2 million years ago, at a time when our ancestors were spreading through Africa, Europe and Asia, ...
Japanese researchers film rare baby fish 'fossil'
Japanese marine researchers said Tuesday they had found and successfully filmed a young coelacanth -- a rare type of fish known as "a living fossil" -- in deep water off Indonesia.
Nov 17, 2009 |
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New study finds titan cells protect Cryptococcus
Giant cells called "titan cells" protect the fungus Cryptococcus neoformans during infection, according to two University of Minnesota researchers. Kirsten Nielsen, Ph.D., an assistant professor in the department of microb ...
18 hours ago |
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SKA super telescope to be built in Australia, South Africa (Update 2)
A long-running joust to host a radio telescope that would give mankind its farthest peek into the Universe ended on Friday with a Solomon-like judgement to split the site between Australia and South Africa.
May 25, 2012 |
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The largest known true crocodile identified
A crocodile large enough to swallow humans once lived in East Africa, according to a University of Iowa researcher.
Other Sciences / Archaeology & Fossils
May 05, 2012 |
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Ancient network of rivers and lakes found in Arabian Desert
(Phys.org) -- Satellite images have revealed that a network of ancient rivers once coursed their way through the sand of the Arabian Desert, leading scientists to believe that the region experienced wetter ...
Other Sciences / Archaeology & Fossils
May 01, 2012 |
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Did climate change shape human evolution?
(Phys.org) -- As human ancestors rose on two feet in Africa and began their migrations across the world, the climate around them got warmer, and colder, wetter and drier. The plants and animals they competed ...
Other Sciences / Archaeology & Fossils
Apr 24, 2012 |
3.5 / 5 (4) |
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Geologists correct a rift in Africa
The huge changes in the Earth's crust that influenced human evolution are being redefined, according to research published today in Nature Geoscience.
Space & Earth / Earth Sciences
Mar 26, 2012 |
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European grasslands challenge rainforests as the most species-rich spaces on Earth
The city of Manila holds the human world record for the most densely populated space and now an international team of ecologists are seeking the natural equivalent, the most species rich area on earth. The team's findings, ...
Mar 15, 2012 |
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Chimp populations show great genetic diversity, with implications for conservation
Chimpanzee populations living in close proximity are substantially more different genetically than humans living on different continents, according to a study published in PLoS Genetics. Research conducted by sci ...
Mar 01, 2012 |
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Africa
Africa is the world's second-largest and second most-populous continent, after Asia. At about 30.2 million km² (11.7 million sq mi) including adjacent islands, it covers 6% of the Earth's total surface area and 20.4% of the total land area. With a billion people (as of 2009, see table) in 61 territories, it accounts for about 14.8% of the World's human population. The continent is surrounded by the Mediterranean Sea to the north, the Suez Canal and the Red Sea to the northeast, the Indian Ocean to the southeast, and the Atlantic Ocean to the west. Not counting the disputed territory of Western Sahara, there are 53 countries, including Madagascar and various island groups, associated with the continent.
Africa, particularly central eastern Africa, is widely regarded within the scientific community to be the origin of humans and the Hominidae tree (great apes), as evidenced by the discovery of the earliest hominids and their ancestors, as well as later ones that have been dated to around seven million years ago – including Sahelanthropus tchadensis, Australopithecus africanus, A. afarensis, Homo erectus, H. habilis and H. ergaster – with the earliest Homo sapiens (human) found in Ethiopia being dated to ca. 200,000 years ago.
Africa straddles the equator and encompasses numerous climate areas; it is the only continent to stretch from the northern temperate to southern temperate zones.
For more information about Africa, read the full article at
Wikipedia.
This text uses material from Wikipedia and is available under the GNU Free Documentation License.