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Ten years ago, researchers discovered that Earth gives off a constant humming sound, basically imperceptible to the human ear which cannot hear sounds with a frequency below 16 Hertz, and called it the Earth's hum. The sound continues to make itself heard to seismometers even when there is no seismic activity in... |
17 April 2008
08:08 GMT |
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A new study argues that by exerting extreme levels of pressure on insulating crystals, they could be turned into excellent electrical conductors. Manganese oxide, a mineral found in Earth's crust is not an electricity conductor under normal atmospheric pressure and temperature conditions, but, when subjected to ... |
6 February 2008
04:11 GMT |
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The theory of the plate tectonics and continental drift was accepted in the '60s, when the proofs came from the ocean. Earth's external layer is called lithosphere. It is a rigid blanket with a thickness of about 100 km (62 mi). It includes both the oceanic platform and the continental crust, but also the u... |
23 January 2008
14:06 GMT |
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Norwegian researchers have just found the oldest known chunk of Earth crust, located in Greenland, and aged at least 3.8 billion years. It is an ophiolite, an originally oceanic crust that was lifted and exposed within continental crust, that's why it's the best evidence yet that plates have been moving acr... |
23 March 2007
08:39 GMT |
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