A collaboration between industry and the US national measurement laboratory is quantifying the comparative performance of extreme-high-vacuum technologies
Read article: Shedding light on XHV-capable materials
Why scientists have changed the way we define mass
Read article: Redefining the kilogram
From a human ruler to a space-sickness scale, Stephen Ornes looks at how some of the oddest and most surreal units came to exist
Read article: It’s all smoots and garns
Robert P Crease explains why philosophers are fascinated by the redefinition of SI units
Read article: New views on units
Helen Margolis discusses how humans have been trying to measure time with increasing accuracy for centuries, and how the next step in that quest is the optical atomic clock
Read article: A brief history of timekeeping
Innovative Hall sensors deliver improved performance in the new F71 and F41 teslameters from Lake Shore Cryotronics
Read article: High-performance teslameters offer extra precision
Find out why it'll be au revoir to the International Prototype Kilogram at a meeting in Paris this month
Read article: Redefining the kilogram: the November 2018 issue of Physics World is now out
Computer simulations reveal electromagnetic properties of huge structure at Giza
Read article: Chambers in Egypt’s Great Pyramid concentrate radio waves
With today's high-speed financial markets, every microsecond counts – but how do traders stay up to speed? Jon Cartwright explains
Read article: Time traders
Device does not need to be chilled to ultralow temperatures
Read article: Graphene-based bolometer runs at ultrafast speeds
