00:00Standard atomic clocks lose a single second every billions of years.
00:05Researchers inside the National Institute of Standards and Technology
00:09face a brutal physical barrier.
00:11Common sense says trapping cesium atoms harder
00:14is the only way to build better timekeeping.
00:17Thorium nuclear isomers absorb ultraviolet laser light
00:21directly inside the atomic nucleus itself.
00:24This nuclear heartbeat locks time so perfectly
00:27that standard atomic clocks lose.
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