The relationship between friction and load, quantified three centuries ago, has an exception when the interaction causes ...

The force between two magnets is an “inverse cube law” with the additional complication that there’s also a torque which tries to twist the magnets so they align north pole to south pole. Like poles ...

The attractive force between two surfaces in a vacuum - first predicted by Hendrik Casimir over 50 years ago - could affect everything from micromachines to unified theories of nature. What happens if ...

A number of readers questioned the veracity of the technology presented in this article. To address their concerns, we did a follow-up, which can be found here. Permanent magnets are an integral part ...