How ancient Scottish rocks throw ‘snowball Earth’ theory up in the air

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The first thing a multi-tasking operating system needs from hardware is isolation: multiple programs must share one processor without being able to read, write, or jump into each other's memory. The 80386 achieves this through memory protection -- two independent address translation layers.

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Lovell, Jack Swigert and Fred Haise were men of science - highly trained and determined to follow Armstrong and Aldrin to the lunar surface. But things went badly wrong.