Bioenergy plantations could fight climate change—but threaten food crops, U.N. panel warns | Science

Big bioenergy plantations, such as these cottonwoods in France, can displace natural environment and food crops. MICHEL BUREAU/MINDEN PICTURES In the effort to keep the world from reaching unsafe... Read more »

U.S. plans for Mars should include more than sample return, report warns | Science

NASA has actually fallen back on its launch cadence for Discovery objectives such as Insight, which flew in May. JPL-CALTECH/NASA NASA has to prepare for future journeys to Mars... Read more »