On Aug. 20, 2013 at 4:24 am EDT, the sun erupted with an Earth-directed coronal mass ejection or CME, a solar phenomenon which can send billions of tons of particles into space that can reach Earth one to three days later.
Fuente : http://www.eurekalert.org/pub_releases/2013-08/nsf...
Fuente : http://www.eurekalert.org/pub_releases/2013-08/nsf...



Tendencias Científicas
La prevención del VIH no llega a las jóvenes sudafricanas

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