Oil production used to fall when prices were low. But a new drilling boom in Alaska, driven by technical advances and global partnerships, spotlights America's rise as a world oil power.
How is rapid warming in the Arctic affecting animals that are adapted to cold? A wildlife biologist is using many techniques to find out, including stalking muskoxen in a polar bear costume.
An Arctic iceberg, pictured in 2015. This year, ice coverage has reached record lows for the early northern winter.
AWeith/Wikimedia Commons
The end of 2016 has brought balmy Arctic temperatures and record low ice extent for the time of year. It's a freak event even by modern standards, and climate models point the finger firmly at humans.
America appears as divided over key aspects of foreign policy as it is at home. So how does President-elect Trump hope to handle that divide, and what will be the major issues facing him?
Testing the waters.
NASA Goddard Space Flight Center Follow
2015 was the world's hottest year on record. The US State of the Climate report has rounded up the litany of temperature and other records that were broken all over the globe.
Arctic migrants such as this Sanderling face an uncertain future.
Erik Thomsen
Well Santa has come and gone, at least for the largest proportion of the world’s population. And, as we reach the end of the year, it is inevitably time to review recent trends and the prospects for 2016…
Global warming is changing the movement of carbon within northern ecosystems to the point where the Arctic could become a net source, rather than sink, of greenhouse gas emissions.
Carbon in some types of ancient permafrost is digested by greenhouse gas-producing microbes.
US Bureau of Land Management
Scientists are studying how carbon-rich permafrost known as yedoma acts much like frozen vegetables to hungry microbes -- and is becoming an additional source of heat-trapping gases.