54 cities on track to meet climate targets, NASA’s water-purification system...

Sumatran rhino donor eggs gain diversity, USA’s first battery-powered trains,...

Oregon Hits Recycling High, Land Titles to Fight Poverty, Pill Painlessly Injects...

By mandating a minimum refund, Oregon has managed to see bottles returned at a rate of 90%, informal settlers...

Europe’s air is getting cleaner, Sudan promises to stamp out child marriage, space...

Hungary is banning mink and fox fur farming; US scientists have created an eco-friendly insulation foam; 23-year-old Judit Giró...