5000 visitors flocked to the UK's National Physical Laboratory Open House in the run up to World Metrology Day
In an ever-changing world the few constants we can rely on become ever more important. The distance
You’ve reached the limit of what you can view on Physics World without registering
If you already have an account on Physics World, then please sign in to continue reading
If you do not yet have an account, please register so you can
Access more than 20 years of online content
Choose which e-mail newsletters you would like to receive
Anna Demming
is a science journalist based in Bristol, UK