Coming November 17, 2026
The leap second: the second the world voted to delete
How did 23:59:60 end up on our clocks? We cover the 27 leap seconds added since 1972, the 2012 leap second that caused outages at major websites, and the international decision to stop adding them.
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Time and measurement
Clocks, calendars and the standards that hold them together.
Earth and space
Our planet's rotation, orbits and the cosmos beyond.
Physics
The fundamental rules, explained visually.
Technology
The hidden systems behind the internet and modern devices.