Scientists on Arctic sea ice in the Chukchi Sea, surrounded by melt ponds, July 4, 2010.
Climate change is transforming the Arctic, with impacts on the rest of the planet. A geographer explains why he once doubted that human actions were causing such shifts, and what changed his mind.
The Arctic National Wildlife Refuge is home to a great diversity of wildlife – one reason environmentalists oppose oil and gas drilling.
US Fish and Wildlife Service
Alaska and oil proponents are cheering a move to open up an ecologically sensitive part of the Arctic National Wildlife Refuge to drilling -- a position environment supporters can't abide.
A brown bear snags a sockeye salmon in Alaska. In warm years, red elderberries ripen early and Kodiak bears leave streams full of salmon to eat them.
Climate change is making berries ripen early in Kodiak, Alaska, luring bears away from eating salmon. This shift may not hurt the bears, but could have far-reaching impacts on surrounding forests.
San Juan, Puerto Rico, Nov. 3, 2012.
AP Photo/Ricardo Arduengo
Hawaii was the last state to join the Union. It didn’t happen without a lot of political dealmaking.
A sea otter floats in Kachemak Bay, Alaska.
AP Photo/Laura Rauch
Sea otters had been absent from this Alaskan national park for at least 250 years. By marrying math and statistics, scientists map this animal's successful comeback.
Trans-Alaska Pipeline, northern Brooks Range, Alaska.
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.
Denali is the highest peak in North America, and the tussle over its name symbolizes the U.S. relationship with Alaska’s Natives.
Al Grillo/AP Photo
The tale of how and why Russia ceded its control over Alaska to the U.S. 150 years ago is actually two tales and two intertwining histories.
There could be great wealth out there. But who benefits from it?
Space mining could generate a massive resources boom. Here's a way to make sure the benefits of that boom reach everyone on the planet.
The biggest state has a brand new map.
Geologic Map of Alaska
On printed maps, piling on the detail risks obscuring the meaning. This new digital map is really more of a database from which users can create different versions that match their own interests.
Obama made a trip to Alaska to steer the national conversation to the effects of climate change.
Obama's trips to vastly different areas – New Orleans and Alaska – laid bare the rising costs of adapting to climate change, now and in the future.
The tallest mountain in the US is again called Denali.
For millennia, the Koyukon Athabascan have called the 20,000-foot mountain "the tall one."
Augustine Volcano, one of Alaska’s many ash-belchers.
A volcanic eruption in Iceland caused massive disruption throughout Europe in 2010. A huge ash cloud grounded more than 100,000 flights and delayed 10m passengers, costing the aviation industry more than…
Prop 91 - just one of three ballot initiatives on marijuana decriminalization
Editor’s note: There were 146 state-wide ballot measures up for consideration by voters in this week’s midterm elections, covering all manner of controversial issues – from abortion and guns to minimum…
Earthquakes could act as an early warning system for volcanic eruptions, according to new research. Researchers have found…
An Inupiat Eskimo family from Alaska in 1929, whose ancestors would have crossed Beringia thousands of years previously.
The theory that the Americas were populated by humans crossing from Siberia to Alaska across a land bridge was first proposed as far back as 1590, and has been generally accepted since the 1930s. But genetic…