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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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What we cover

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.