sábado, 29 de enero de 2011

13% of H.S. Biology Teachers Advocate Creationism in Class | Teaching Evolution vs. Intelligent Design | Science Education | LiveScience

13% of H.S. Biology Teachers Advocate Creationism in Class | Teaching Evolution vs. Intelligent Design | Science Education | LiveScience
El artículo nos puede llevar a un debate a cerca de si lo que los profesores de biología piensan o sienten a cerca de la evolución del universo y de la vida, puede de alguna manera interferir en su forma de explicar la materia o cuánto profundizar en el tema.

sábado, 22 de enero de 2011

High-Speed Geology: Violent Seismic Activity Tearing Africa in Two - SPIEGEL ONLINE - News - International

High-Speed Geology: Violent Seismic Activity Tearing Africa in Two - SPIEGEL ONLINE - News - International

De Etiopía a Mozambique, el gran valle del Rift Africano está mostrando como "pronto" cambiará de forma. Los satélites informan detalladamente de cómo las grandes fisuras no hacen sino crecer en número y profundidad.

lunes, 17 de enero de 2011

Mammoth 'could be reborn in four years'

The woolly mammoth, extinct for thousands of years, could be brought back to life in as little as four years thanks to a breakthrough in cloning technology.

Previous efforts in the 1990s to recover nuclei in cells from the skin and muscle tissue from mammoths found in the Siberian permafrost failed because they had been too badly damaged by the extreme cold.

But a technique pioneered in 2008 by Dr. Teruhiko Wakayama, of the Riken Centre for Developmental Biology, was successful in cloning a mouse from the cells of another mouse that had been frozen for 16 years.

Now that hurdle has been overcome, Akira Iritani, a professor at Kyoto University, is reactivating his campaign to resurrect the species that died out 5,000 years ago.

"Now the technical problems have been overcome, all we need is a good sample of soft tissue from a frozen mammoth," he told The Daily Telegraph.

He intends to use Dr Wakayama's technique to identify the nuclei of viable mammoth cells before extracting the healthy ones.