In 1988, a 23-year-old Cornell graduate student named Robert Morris released a self-replicating program to measure the size of the internet — within hours it had crashed roughly 6,000 of the 60,000 machines then online, and computer security became a field

In 1988, a 23-year-old Cornell graduate student named Robert Morris released a self-replicating program to measure the size of the internet — within hours it had crashed roughly 6,000 of the 60,000 machines then online, and computer security became a field

The GPS satellites orbiting 20,200 kilometres overhead run their clocks about 38 microseconds faster per day than clocks on the ground — without Einstein's relativity correcting for it, GPS would drift by roughly 10 kilometres every 24 hours

The GPS satellites orbiting 20,200 kilometres overhead run their clocks about 38 microseconds faster per day than clocks on the ground — without Einstein’s relativity correcting for it, GPS would drift by roughly 10 kilometres every 24 hours

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