EarthBright skies at night: The riddle of the nocturnal sunBefore artificial lights blinded our sight, reports of nights as bright as day were common. What lay behind the phenomenon was a mystery – until nowFeatures
PhysicsWhy Hawking's PhD thesis is now an internet-breaking inspiration Millions rushed to freely access Stephen Hawking's early musings when they went online. More of the same would help ignite young minds everywhere, says Geraint Lewis Comment