BBC Inside Science
How do we measure time accurately and why is the rotation of the Earth causing problems?
This is a short extract from a report by BBC News. The full text stays with the publisher — follow the link to read it there.
Read at sourceHow do we measure time accurately and why is the rotation of the Earth causing problems?
This is a short extract from a report by BBC News. The full text stays with the publisher — follow the link to read it there.
Read at source