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Browse images from a wide range of science topics covered by USGS.

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Three men kneel in the snow while examining a long thin core of sediment, one man pointing and talking, one man taking notes.
Examining Arctic lake sediment core
Examining Arctic lake sediment core
Examining Arctic lake sediment core

John Pohlman (USGS, left) and colleagues from the University of Alaska Fairbanks examine a sediment core retrieved through winter ice from the bottom of a lake in northern Alaska. Such cores are used to reconstruct methane emissions and climate history over the past 20,000 years.

John Pohlman (USGS, left) and colleagues from the University of Alaska Fairbanks examine a sediment core retrieved through winter ice from the bottom of a lake in northern Alaska. Such cores are used to reconstruct methane emissions and climate history over the past 20,000 years.

Molecular ecology laboratory procedure
Molecular ecology laboratory procedure
Molecular ecology laboratory procedure
Molecular ecology laboratory procedure

Rob Wilson adding prepared genetic material to a gel in the Alaska Science Center Molecular Ecology Laboratory.

Lisa Pajot pipetting ethanol into small vials for DNA extraction
Extracting DNA from sample
Extracting DNA from sample
Extracting DNA from sample

Lisa Pajot extracting DNA from samples (specifically she is precipitating the DNA out of solution with ethanol).

Lisa Pajot extracting DNA from samples (specifically she is precipitating the DNA out of solution with ethanol).

Image: Sunset on the Gulf of Alaska
Sunset on the Gulf of Alaska
Sunset on the Gulf of Alaska
Small bird in a hand
Normal Black-capped Chickadee
Normal Black-capped Chickadee
Clear Montana Bill Creek flowing into volcanically silted creek
Clear Montana Bill Creek flowing into volcanically silted creek
Clear Montana Bill Creek flowing into volcanically silted creek
Clear Montana Bill Creek flowing into volcanically silted creek

A clear Montana Bill Creek flowing into volcanically silted creek. Coho salmon are seen holding in the clear water area. Aerial surveys were done after the eruption of the Redoubt volcano to determine the condition of fish streams.

A clear Montana Bill Creek flowing into volcanically silted creek. Coho salmon are seen holding in the clear water area. Aerial surveys were done after the eruption of the Redoubt volcano to determine the condition of fish streams.

Cannery Creek after the Redoubt Volcano eruption of 2009
Cannery Creek after the Redoubt Volcano eruption of 2009
Cannery Creek after the Redoubt Volcano eruption of 2009
Cannery Creek after the Redoubt Volcano eruption of 2009

Cannery Creek on the west side of Cook Inlet, Alaska.  Aerial surveys were done after the eruption of the Redoubt volcano to determine the condition of fish streams.

Cannery Creek on the west side of Cook Inlet, Alaska.  Aerial surveys were done after the eruption of the Redoubt volcano to determine the condition of fish streams.

Drift River lahar from shore after the Redoubt Volcano 2009 eruption
Drift River lahar from shore after the Redoubt Volcano 2009 eruption
Drift River lahar from shore after the Redoubt Volcano 2009 eruption
Drift River lahar from shore after the Redoubt Volcano 2009 eruption

Drift River on the west side of Cook Inlet, Alaska. Lahars from the eruption of Redoubt are evident. Surveys were done after the eruption of the Redoubt volcano to determine the condition of fish streams.

Drift River on the west side of Cook Inlet, Alaska. Lahars from the eruption of Redoubt are evident. Surveys were done after the eruption of the Redoubt volcano to determine the condition of fish streams.

The lower Drift River after the Redoubt Volcano 2009 eruption
The lower Drift River after the Redoubt Volcano 2009 eruption
The lower Drift River after the Redoubt Volcano 2009 eruption
The lower Drift River after the Redoubt Volcano 2009 eruption

Lower Drift River with tremendous amount of silt from the lahars. Aerial surveys were done after the eruption of the Redoubt volcano to determine the condition of fish streams.

Lower Drift River with tremendous amount of silt from the lahars. Aerial surveys were done after the eruption of the Redoubt volcano to determine the condition of fish streams.

A panorama of the Redoubt Volcano after the 2009 eruption and the Drift River delta in the foreground
Redoubt Volcano panorama with the Drift River Delta
Redoubt Volcano panorama with the Drift River Delta
Redoubt Volcano panorama with the Drift River Delta

A panorama of the Redoubt Volcano after the 2009 eruption and the Drift River delta in the foreground

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