A Toxic Pit Could Be a Gold Mine for Rare-Earth Elements

A Toxic Pit Could Be a Gold Mine for Rare-Earth Elements

Mining continues at the Continental Pit. Nearby is the Berkeley Pit, a site for acid mine drainage that poses an opportunity for extracting valuable metals.
The Nonstop Work of Ukrainian Air Defenses: ‘We Have No Days Off’

The Nonstop Work of Ukrainian Air Defenses: ‘We Have No Days Off’

Russian air attacks on Kyiv have come in relentless waves. Yet very little has penetrated the patched-together but increasingly sophisticated air defense network. Here’s why.