EarthFishing has driven evolution of smaller Alaskan salmon Evolution induced by fishing may explain why the bodies of Alaska's sockeye salmon have shrunk by 5 per cent since the 1940s 51¶¯Âþ
EarthCrop yields fall as temperatures rise The steep rise in global temperatures since 1980 has cut yields of staple crops, offsetting gains from better farming 51¶¯Âþ