Finally! A replacement crew has arrived at the ISS, and Suni Williams and Butch Wilmore will come home at last.

As the planet gets hotter, our frozen world is shrinking ... The state of the Earth’s ice and snow affects every living being. The UN proclaimed the Decade of Action for Cryospheric Sciences ...

Promising results from an early-stage trial suggest that lenacapavir injections might offer long-lasting protection. What will really matter in the long run? That’s the question we tackle each ...