If we ever lose a leap second, UTC goes straight from 23:59:58 to 00:00:00, but Unix time goes up by two seconds
@blackdew Earth's internals can, and sometimes do, settle into lower-energy states. Smaller moment of inertia => higher angular speed
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@blackdew Earth's internals can, and sometimes do, settle into lower-energy states. Smaller moment of inertia => higher angular speed