Science

Chemicals from fire retardants and other materials have accumulated in the bodies of seals, whales and other animals of the northern Bering Sea.

In Glacier Bay National Park, scientist Ben Gaglioti pulls cylinders out of the trees that can provide more than 300 years of data.

Warm conditions in the waters surrounding the Alaska Peninsula have produced algal blooms that threaten the safety of food important to coastal residents, according to a recent report.

Columnist Ned Rozell documents a research trip that has him considering the process of gathering scientific evidence as much as the science itself.

Tundra fires have always happened. But historically, they were small and infrequent, experts say, describing the current situation as “unprecedented.”

Dogs are able to distinguish smells — molecules of odor that emanate from every living or once-living thing — at least 1,000 times better than humans.

Katey Walter Anthony’s book takes readers to unexpected places throughout Greenland, Siberia and Alaska in her study of methane gas emissions in northern lakes.

A combination of factors — record lightning strikes, dry conditions and extreme heat — led to the worst fire season in recent memory.

The enormous amount of data collected is being used to study ocean acidification that can harm and kill certain marine life.

When ice knocked instruments that measure river levels offline, USGS hydrology experts leaped into action.

Communities and conservation groups have raised concerns about the project. Researchers said they won’t move forward with field testing until it’s deemed safe.

There are still likely to be pulses of ice passing through the river there, but the first stage of breakup was somewhat benign.

There is a high potential for snow-jam or icemelt flooding, but recent cold nights have allowed for a relatively consistent melt so far.

During the short Arctic summer, mosquitoes form massive swarms. But Alaska mosquitoes are less dangerous than those in other places.

With an annual runoff of 650 million acre-feet, Alaska has about one-third the total of the country’s water.

After a polar bear damaged George Divoky’s cabin on Cooper Island, he returned to patch up the spot he’s used to monitor bird populations for nearly 50 years.

From moose to owls, a number of creatures struggled through a winter with above normal snowpack. How will they fare going forward?

Permafrost loss, flooding and giant underground landslides known as “frozen debris lobes” are three of the biggest concerns.

The cause of the quakes under Mount Edgecumbe, near Sitka, are not known but don’t necessarily indicate volcanic activity, scientists say.

Knut Kielland with UAF’s Department of Biology and Wildlife is trying to understand the ecology of the boreal-forest cats.

Science writer Ned Rozell joins a UAF ecologist on a mission to track the movement of the boreal-forest cats.

This week’s especially good aurora forecast could bring an array of colors, including deep reds and pinks.

A research expedition involving American, Canadian and Russian scientists is trying to understand salmon booms and busts in the “black box’” of the high seas.