Happy Earth Day! Each April 22, Earth Day marks the anniversary of what many consider the birth of the modern environmental movement in 1970. The idea came to founder Gaylord Nelson, then a U.S.
Cartoon of the Earth with cutaway showing the mantle and inner and outer core. Magnetic field lines produced by the geodynamo extend into space and interact with the solar wind. The iron-rich core at ...
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Cartoon cross section of the Earth showing the mantle, outer core and inner core. Convection in the outer core produces Earth's geomagnetic field. The properties of Earth’s iron-rich core are key to ...
A free daily email with the biggest news stories of the day – and the best features from TheWeek.com Contact me with news and offers from other Future brands Receive email from us on behalf of our ...
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