Harvard Kennedy School Professor John Holdren and Arctic Initiative director Jennifer Spence say multiple new threats are endangering both the Arctic’s vital ecosystem and its legacy of fostering ...

Climate change–accelerated seaweed growth could cause seaweed-dependent microbes to proliferate and consume more oxygen, ...

Lewis Pugh has followed an unspoken rule during his career as one of the world’s most daring endurance swimmers: Don’t talk ...

The polar ice caps are melting. And this has already led to an increase in the sea level. Between now and 2100, it is ...