Balancing act The two systems of measurement – imperial and metric – are often used together in UK shops. (Courtesy: iStock/Paolo Paradiso) When I was at primary school in the 1960s, measurements were ...

A single equation can describe how fluids flow across a wide range of length scales, from ocean currents to swimming algae. The difference merely lies in the Reynolds number, says Julia Yeomans. As ...

The big science-y news of last week was the vote to officially redefine of the kilogram-- see the stories in Physics World and Physics Today for more detail--after decades of work by physicists on ...

Metrology is defined as the science of measurement. Metrology dates back to the ancient world, but modern metrology is derived from the politics French revolution, where the standardisation of units ...