A new retinal stimulation technique called Oz enabled volunteers to see colours that lie beyond the natural range of human vision. Developed by researchers at UC Berkeley, Oz works by stimulating ...

Even more unexpectedly, I have been able to make tennis-ball towers consisting of layers of four balls (4 n + 1) and five ...

A quarter of a century after he started writing his “Critical Point” column, Robert P Crease reveals his underlying message ...

Brain–computer interfaces (BCIs) enable the flow of information between the brain and an external device such as a computer, ...

A proposed experiment that would involve trapping atoms on a two-layered laser grid could be used to study the mechanism ...

“At low temperatures, models of reactivity must include the effects of the permanent electric dipoles and quadrupole moments ...

A team of researchers in Switzerland, Germany and the US has observed clear evidence of quantum mechanical interference ...

Access more than 20 years of online content Manage which e-mail newsletters you want to receive Read about the big breakthroughs and innovations across 13 scientific topics Explore the key issues and ...