SpaceThe usual way of hunting dark matter may be all wrong If dark matter isn't heavy and interacts even weakly with normal matter, we should drag our detectors out from underground to catch it News
EarthPlanting trees could mop up ten years’ worth of greenhouse gases The planet is still warming inexorably, with 2017 set to be one of the three hottest years on record, but a major programme of tree-planting could help cool the world News