Latest Issue 4 May 2016 Latest Issue 4 May 2016 Using dye, quartz slides and an inkjet printer, researchers in Europe have made disposable components for a laser.Fry Design Ltd / Getty Images NewsTechnology Introducing inkjet-printed disposable lasers Scientists make 'lasing capsules' simply and cheaply. by Belinda Smith News Space Ancient Martian volcanoes shed light on ice sheets by Cosmos reporter Spectrometer analysis of mountainous region by NASA's Mars Reconnaissance Orbiter. News Life Sciences Why Labradors are obsessed with food – it's in their genes by Viviane Richter Study shows why the breed is most likely to be obese. News Technology Cafe to construction site: coffee grounds can be used to build roads by Phil Ritchie Laying the foundation for new green materials. News Space NASA set to cover the transit of Mercury by Cosmos reporter Crossing the face of the Sun for the first time since 2006. News Technology How do heat shields on spacecraft work? by Jake Port Protecting astronauts against the extreme heat of re-entry.