Science

This photo shows a porcupine near Valdez. (Courtesy Photo / Ned Rozell)

Alaska Science Forum: The porcupine’s winter in slow-motion

While running through Bicentennial Park in Anchorage, biologist Jessy Coltrane spotted a porcupine in a birch tree. On her runs on days following, she saw… Continue reading

 

A bumblebee had pried open a lupine flower (Courtesy Photo / Kerry Howard)

On the Trails: Social bees and social learning

Dancing, dialects and more.

 

HP Marshall of Boise State University takes a photo of Alaska’s North Slope north of the Brooks Range during a snow survey as part of a NASA experiment. (Courtesy Photo / Sveta Stuefer)

Alaska Science Forum: Dozens descend upon Alaska to measure snow

“We would like to be able to map the water-equivalent (in snow) globally.”

 

Female mosquitoes have complex mouthparts, with toothy maxillae that saw a hole in the host, an injection tube for saliva, and another tube for sucking up blood. (Courtesy Photo / Bob Armstrong)

On the Trails: Blood-eaters of the animal kingdom

Eating liquid blood is a moderately popular way of life in the animal kingdom.

Female mosquitoes have complex mouthparts, with toothy maxillae that saw a hole in the host, an injection tube for saliva, and another tube for sucking up blood. (Courtesy Photo / Bob Armstrong)
The sun sets over the Pacific Ocean on the west coast of Costa Rica in Central America. (Courtesy Photo / Ned Rozell)

Alaska Science Forum: Stranger in a rich land of winter life

Things an Alaskan notices while standing on a road in Costa Rica…

The sun sets over the Pacific Ocean on the west coast of Costa Rica in Central America. (Courtesy Photo / Ned Rozell)
Five Bohemian waxwings rest on a snowy branch between bouts of feeding. (Courtesy Photo / Kerry Howard)

On the Trails: Variable sightings and weather in winter

Winter is an odd time of year here.

Five Bohemian waxwings rest on a snowy branch between bouts of feeding. (Courtesy Photo / Kerry Howard)
Courtesy Photo / Ned Rozell A tiny bird tooth — 73 million years old — found in bluffs of the Colville River. Lauren Keller carried this sample to her presentation at the University of Alaska Fairbanks.

Alaska Science Forum: Birds in Alaska, 70 million years ago

They’re no spring chickens.

Courtesy Photo / Ned Rozell A tiny bird tooth — 73 million years old — found in bluffs of the Colville River. Lauren Keller carried this sample to her presentation at the University of Alaska Fairbanks.
Killdeer can be seen in winter and nest here in spring. (Courtesy Photo / Bob Armstrong)

On the Trails: Breaking out the snowshoes

Surprise! A starlit night, a nice day, lower temperatures, and then some lovely snow.

Killdeer can be seen in winter and nest here in spring. (Courtesy Photo / Bob Armstrong)
Ravens like this one inspire people to respond to their calls, and sometimes to pick up a pencil. (Courtesy Photo / Ned Rozell)

Alaska Science Forum: Butterflies and ravens as poetic inspiration

Both poets and scientists are deep observers who interpret the world in different ways.

Ravens like this one inspire people to respond to their calls, and sometimes to pick up a pencil. (Courtesy Photo / Ned Rozell)
The red flowers of the native columbine are caused by anthocyanins. (Courtesy Photo / Deana Barajas)

On the Trails: The many roads to red

Red and reddish colors can be produced in many ways, by a variety of pigment molecules.

The red flowers of the native columbine are caused by anthocyanins. (Courtesy Photo / Deana Barajas)
A raven vocalizes on the west side of Fairbanks in April 2021. (Courtesy Photo / Hannah Foss)

Alaska Science Forum: Making sense of raven talk

Do we really want to know what ravens are saying about us?

A raven vocalizes on the west side of Fairbanks in April 2021. (Courtesy Photo / Hannah Foss)
Ben Hohenstatt / Juneau Empire File A porcupine dines in mid-August near the Mendnehall Glacier.

On the Trails: Putting a finer point on porcupines

Plants such as roses and devil’s club aren’t the only prickly ones…

Ben Hohenstatt / Juneau Empire File A porcupine dines in mid-August near the Mendnehall Glacier.
Chunks of ice break off the Perito Moreno Glacier, in Lake Argentina, at Los Glaciares National Park, near El Calafate, in Argentina's Patagonia region, March 10, 2016. As glaciers melt and pour massive amounts of water into nearby lakes, 15 million people across the globe live under the threat of a sudden and deadly outburst flood, a new study finds. (AP Photo / Francisco Munoz)

Study: 15 million people live under threat of glacial floods

More than half of those are in just four countries: India, Pakistan, Peru and China.

Chunks of ice break off the Perito Moreno Glacier, in Lake Argentina, at Los Glaciares National Park, near El Calafate, in Argentina's Patagonia region, March 10, 2016. As glaciers melt and pour massive amounts of water into nearby lakes, 15 million people across the globe live under the threat of a sudden and deadly outburst flood, a new study finds. (AP Photo / Francisco Munoz)
A Compton tortoiseshell butterfly pauses between flights in Two Rivers resident Rod Boyce’s garage in January 2023. Photo by Rod Boyce.

Alaska Science Forum: Butterflies in the middle of winter

Waiting in the wings for spring.

A Compton tortoiseshell butterfly pauses between flights in Two Rivers resident Rod Boyce’s garage in January 2023. Photo by Rod Boyce.
Bog laurel plants are toxic to mammals; pollinating bees that feed on the pollen make toxic honey. (Courtesy Photo / Bob Armstrong)

On the Trails: A green world

Five decades ago, some well-known ecologists looked around and noted that their terrestrial world was very green. Why didn’t herbivores demolish the greenery? The observers… Continue reading

Bog laurel plants are toxic to mammals; pollinating bees that feed on the pollen make toxic honey. (Courtesy Photo / Bob Armstrong)
An Alaska blackfish that once lived in a tank at the Fairbanks office of the Alaska Department of Fish and Game. (Courtesy Photo / Ned Rozell)

Alaska Science Forum: Alaska blackfish in a world of its own

It is an evolutionary loner.

An Alaska blackfish that once lived in a tank at the Fairbanks office of the Alaska Department of Fish and Game. (Courtesy Photo / Ned Rozell)
A deer eats alder leaves (Courtesy Photo / Bob Armstrong)

On the Trails: Nitrogen — an essential element

It’s involved with almost all aspects of life.

A deer eats alder leaves (Courtesy Photo / Bob Armstrong)
Courtesy Photos / Dan Joling Dan Joling of Anchorage captured these images of the full moon over Alaska’s largest city on Jan. 6, 2023.

Alaska Science Forum: Magnetic declination and finding the moon

Dan Joling of Anchorage was set to photograph the full moon rising over the Port of Anchorage on Jan. 6, 2023. His research told him… Continue reading

Courtesy Photos / Dan Joling Dan Joling of Anchorage captured these images of the full moon over Alaska’s largest city on Jan. 6, 2023.
A dipper searches for insects in a log jam, underwater. (Courtesy Photo / Bob Armstrong)
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On the Trails: The afterlife of trees

Dead wood is an important basis for many new uses.

A dipper searches for insects in a log jam, underwater. (Courtesy Photo / Bob Armstrong)
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Visitors take images of Mendenhall Glacier near Juneau in summer 2022 from inside the Mendenhall Glacier Visitor Center. (Courtesy Photo / Ned Rozell)

Alaska Science Forum: Alaska’s small glaciers are on the way out

Even optimistic projections show half of glaciers gone by end of century.

Visitors take images of Mendenhall Glacier near Juneau in summer 2022 from inside the Mendenhall Glacier Visitor Center. (Courtesy Photo / Ned Rozell)