This summer has seen the shortest days in Earth’s recorded history


When time lost to shortened days begins to add up, timekeepers add an extra second to the running clock, bringing astronomical time back in sync with the atomic time it had lagged behind. This is cal… [+1267 chars] Show more...

Scientists break down the reasons why days are getting shorter—and the mystery they're still trying to solve about Earth's core.

author

Brian Handwerk

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