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Elephants recognize themselves in the mirror
Written by Raúl Arrabales Moreno   
Tuesday, 31 October 2006

Image We already knew that humans, great apes, and dolphins are able to recognize themselves in the mirror. Usually, the rest of higher mammals or other animals think the image in the glass belongs to another individual (if they understand the concept of individual at all). According to the research work done at the Yerkes National Primate Research Center at Emory University, elephants have joined this small group of species able to recognize themselves in the mirror. Scientists exposed elephants to 8'x8' mirrors and the pachyderms responded with behavior of self-awareness, including touching marks painted on their foreheads, and inspecting their own body.

Scientists say that animals express this ability in four phases. The first one is a social response to the image in the mirror. Secondly, a physical inspection of their own body is performed. And the final recognition of themselves comes after some imitating behaviors. Animals with this ability are self-conscious and generally evolve to more complex social abilities (like empathy). Nevertheless, only one of the elephants participating in the experiment touched the mark painted on his forehead. If the elephant’s self-awareness hypothesis is true, we should expect more experiment results in this way.

More information: Yerkes Primate Research Center

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Last Updated ( Wednesday, 20 December 2006 )
 
We know the brain as much as Galileo knew the universe
Written by Raúl Arrabales Moreno   
Tuesday, 31 October 2006
The knowledge we currently have about the human brain is comparable to the knowledge about the Universe we had in Galileo’s time, said the Novel Prize Torsten Wiesel during a meeting in Santiago de Compostela (Spain). Mr. Wiesel argues that plasticity is a key factor in human brain development as many regions of it need stimuli for their development. Wiesel received the Nobel Prize jointly with Hubel thanks to their work on brain visual processing. They demonstrated that the brain needs to configure itself after birth. i.e., even though no physical problem exists, without stimuli there is no brain development.
 
Within the framework of ConCiencia program, coordinated by the professor Jorge Mira, Mr. Wiesel talked about the challenges of human brain understanding. When he was asked about the percentage of human brain that we currently understand, he answered that our knowledge of human brain is more or less the same as the knowledge we had about the universe in Galileo’s time. Probably, 90% of the mechanisms in the brain are still unknown. Brain imaging techniques are the main advance in the knowledge of the brain. These techniques allow us to study not only isolated cells but brain processes in general, Wiesel said. 
 

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Last Updated ( Wednesday, 20 December 2006 )
 
The Complete Work of Charles Darwin Online
Written by Raúl Arrabales   
Monday, 23 October 2006
Image In the context of evolutionary computing it is very interesting to know that from October 2006 the Universoty of Cambridge offers the complete work of Charles Darwin online at darwin-online.org.uk.
 
 The site contains more than 50,000 searchable text pages and 40,000 images of both publications and handwritten manuscripts. There is also the most comprehensive Darwin bibliography ever published and the largest manuscript catalogue ever assembled. More than 150 ancillary texts are also included, ranging from secondary reference works to contemporary reviews, obituaries, published descriptions of Darwin's Beagle specimens and important related works for understanding Darwin's context.
 
  There are other two websites referenced in Darwin-Online home providing complementary Darwin materials:

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Last Updated ( Wednesday, 20 December 2006 )
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