[PDTV] National Geographic - Earth's Force Field (2009) *MVGroup*

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National Geographic - Earth's Force Field (2009) *MVGroup*





Título original: Earth's Force Field
Ano: 2009
Tamanho: 701 Mb
Duração: 00:46:58
Ficheiro: AVI
Narrado:
Legendado:
Video:  XviD , 704 x 400
Áudio: MP3
Ripper: MVGroup




The Earths magnetic field, the protector of all life on Earth is under constant attack from deadly cosmic radiation. This invisible shield that we live in is weakening in a region over the South Atlantic, leaving it exposed to potentially lethal radiation. Is the Earth losing its magnetic field and doomed to a fate similar to Mars? Many scientists believe the answer lies in paleomagnetic data, and that this weakening may be a precursor to a magnetic field reversal; scientists know Earth is long overdue. However, humans were not around when the last reversal took place, so what does this mean for life?

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