Children are seen sledding in Coulsdon, Surrey, outside London.
Guillaume Saladin left his career as a professional acrobat to help young Inuits in northern Canada form Artcirq, their own performing troupe.
Many caribou herds have lost more than half their number from the maximums of recent decades.
Scientists wonder whether rising CO2 may trigger something else that further warms the climate
Free, online lectures and course materials offer Ivy-League classes to everyone.
Australian sculptor brings a rare civic vision to his geoglyphs the world over.