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Tom Whipple, Science Editor

21 November 2016

In the early hours of the morning on January 26 this year, alarms started going off in the operations centres of the world’s telecoms companies. For a few frantic hours, their engineers tried to resolve a problem that threatened to crash mobile networks and bring down critical infrastructure.

The problem? Far above their heads, global positioning satellites were broadcasting a time that was out by 13 millionths of a second. And the world’s banks, communications networks and broadcasters got very confused.  You're 13 microseconds late again ...

Datasheet: Clock crisis averted in the nick of time