Scientists have found a more accurate way to measure time.
The French experts say the clocks, which are called optical lattice clocks, lose just one second every 300 million years.
We used to use the Earth’s rotation to measure time, where one spin equals one day.
But because our planet wobbles on its axis as it rotates, some days can be shorter or longer than others.
So, since the 1960s, we’ve used the atomic clock because it’s much better at keeping the world on time.
An atomic clock uses the very regular “vibrations” of atoms to measure time.
The atomic clock we use right now uses a system called caesium fountains to expose clouds of caesium atoms to microwaves to get them to move. But the new ones use light because laser beams oscillate much faster than microwave radiation.
Dr Jerome Lodewyck, from the Paris Observatory, says: “In a sense we divide time in much shorter intervals so we can measure time more precisely.”
[source: First News]