The Sun's magnetic field and solar wind - mainly in the form of electrons and protons coming out of the Sun - protects the entire Solar System by acting as a sort of shield from cosmic rays (very energetic particles and radiation from outer space).

BBC: Viewpoint: The Sun and climate change

Now picture a health-care system where a doctor has medical records at his fingertips, can see x-rays with the click of a mouse, is able to learn and apply the latest diagnostic and surgical technique from anywhere in the world.

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