EarthGulf leak: biggest spill may not be biggest disaster It's the biggest spill in US history, but it might not do the most ecological damage – it all depends on what kind of slick hits the coastal marshes 51¶¯Âþ
EarthHow interfering humans helped Amazon diversity Even before Europeans arrived, farmers were changing South American ecosystems with a landscaping method previously unrecognised in the region 51¶¯Âþ