Until last month, only one climber had stood atop all 100 of the peaks on the list, and had done so across three decades.

The White House is threatening a close ally with a trade war or worse—but Copenhagen has leverage that could inflict instant ...

Scientists said warming conditions in the Arctic — the region is warming four times faster than the rest of the world — ...

When the Chicago-size iceberg drifted away, scientists seized the opportunity to study the life and geologic formations ...