* Astronomy

Sir Richard Branson is already selling tickets to fly people to the edge of space and now he wants to voyage to the bottom of the deepest oceans.
His latest idea, called Virgin Oceanic, is a scientific endeavour rather than a tourist venture.
One of its intended destinations is the Mariana Trench in the Pacific Ocean which, at 36,000ft deep, is further down than Mount Everest is high.
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