SpaceMercury may have gained all of its unexpected water in a single day Despite being the closest planet to the sun, Mercury has thick deposits of ice at its poles, and now we may understand the events that formed them over just one Mercurian day News
EnvironmentPlug-in solar is coming – how dangerous is it and is it worth it? Plug-in solar panels are a cheaper, simpler alternative to professionally installed panels. But can they really reduce energy bills and are they safe? Matthew Sparkes investigates News