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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, ...

Biology / Evolution

created Jan 21, 2010 | popularity 4.6 / 5 (41) | comments 29 | with audio podcast report

'Space ball' drops on Namibia

A large metallic ball fell out of the sky on a remote grassland in Namibia, prompting baffled authorities to contact NASA and the European space agency.

Space & Earth / Space Exploration

created Dec 22, 2011 | popularity 4.2 / 5 (31) | comments 54

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 ...

Biology / Evolution

created May 12, 2010 | popularity 5 / 5 (21) | comments 9 | with audio podcast

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 ...

Other Sciences / Archaeology & Fossils

created Jun 17, 2011 | popularity 4.9 / 5 (17) | comments 2 | with audio podcast report

Couple finds evidence indicating earliest humans lived by rivers and streams

(PhysOrg.com) -- When many people think of our earliest human ancestors, they think of the hot dried out dusty environments in Africa in which many of their remains were found. Unfortunately, such images don’t ...

Other Sciences / Archaeology & Fossils

created Dec 26, 2011 | popularity 3.3 / 5 (23) | comments 21 | with audio podcast report

Strength in numbers

New research sheds light on why, after 300,000 years of domination, European Neanderthals abruptly disappeared. Researchers from the University of Cambridge have discovered that modern humans coming from Africa swarmed the ...

Other Sciences / Archaeology & Fossils

created Jul 28, 2011 | popularity 4.7 / 5 (16) | comments 16 | with audio podcast

French find puts humans in Europe 200,000 years earlier

Experts on prehistoric man are rethinking their dates after a find in a southern French valley suggested our ancestors may have reached Europe 1.57 million years ago: 200,000 years earlier than we thought.

Other Sciences / Archaeology & Fossils

created Dec 15, 2009 | popularity 4.2 / 5 (17) | comments 0

Astronomers back Chile to host huge telescope

For astronomers, it appears that not only does size really matter but so does an eye-opening location.

Space & Earth / Astronomy

created Feb 12, 2010 | popularity 4.3 / 5 (15) | comments 7

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 ...

Space & Earth / Environment

created Feb 10, 2012 | popularity 4.1 / 5 (16) | comments 21 | with audio podcast report

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

created May 05, 2012 | popularity 4.4 / 5 (14) | comments 2 | with audio podcast

Seeing double: Africa's 2 elephant species

Contrary to the belief of many scientists (as well as many members of the public), new research confirms that Africa has two—not one—species of elephant. Scientists from Harvard Medical School, the ...

Biology / Plants & Animals

created Dec 21, 2010 | popularity 5 / 5 (12) | comments 2 | with audio podcast

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 Massospondylus—revealing significant clues about the evolution of comple ...

Other Sciences / Archaeology & Fossils

created Jan 23, 2012 | popularity 4.6 / 5 (13) | comments 0 | with audio podcast

Climate phenomenon La Nina to blame for global extreme weather events

(PhysOrg.com) -- Recent extreme weather events as far as Australia and Africa are being fueled by a climate phenomenon known as La Nina -- or "the girl" in Spanish. La Nina has also played a minor role in ...

Space & Earth / Earth Sciences

created Feb 07, 2011 | popularity 4.8 / 5 (12) | comments 16 | with audio podcast

Anthropologists clarify link between Asians and early Native-Americans

A tiny mountainous region in southern Siberia may have been the genetic source of the earliest Native Americans, according to new research by a University of Pennsylvania-led team of anthropologists.

Other Sciences / Archaeology & Fossils

created Jan 26, 2012 | popularity 4.6 / 5 (12) | comments 0 | with audio podcast

Evolution during human colonizations

Most human populations are the product of a series of range expansions having occurred since modern humans left Africa some 50,000 years ago to colonize the rest of the world, but how have these processes influenced today's ...

Biology / Evolution

created Nov 03, 2011 | popularity 4.6 / 5 (11) | comments 3 | with audio podcast

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.

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