Most accurate clock ever can tick for 40 billion years without error

The record for the most accurate clock has been broken in an experiment with strontium atoms almost as cold as absolute zero, and it is twice as accurate as any predecessor

​The record for the most accurate clock has been broken in an experiment with strontium atoms almost as cold as absolute zero, and it is twice as accurate as any predecessor The record for the most accurate clock has been broken in an experiment with strontium atoms almost as cold as absolute zero, and it is twice as accurate as any predecessor