EnvironmentAntarctica may have crossed a tipping point that leads to rising seas ¿ìè¶ÌÊÓÆµs are beginning to understand the sudden loss of sea ice in Antarctica – and there is growing evidence that it represents a permanent shift with potentially catastrophic consequences ¿ìè¶ÌÊÓÆµ
SpaceNASA's asteroid deflection test had unexpected and puzzling outcome The DART mission achieved its goal of changing one asteroid’s orbit around another, but questions remain about why the orbit continued to alter over the following month ¿ìè¶ÌÊÓÆµ