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Scientists apply a new method for determining the fate of methane discharged into streams. Here, gas is injected into stream water along West Bear Creek, North Carolina.
Scientists apply a new method for determining the fate of methane discharged into streams. Here, gas is injected into stream water along West Bear Creek, North Carolina.
The empty interior of an ocean-going ship's ballast tank. Such tanks are filled with water to balance a ship's loads.
The empty interior of an ocean-going ship's ballast tank. Such tanks are filled with water to balance a ship's loads.
A drilling rig for shale gas development take at night from an overlook on Route 6 in Bradford County Pennsylvania.
A drilling rig for shale gas development take at night from an overlook on Route 6 in Bradford County Pennsylvania.
Kīlauea Volcano's summit vent within Halema‘uma‘u Crater was more than 500 feet across in March 2013, five years after it opened.
Kīlauea Volcano's summit vent within Halema‘uma‘u Crater was more than 500 feet across in March 2013, five years after it opened.
Ticks spread the widest variety of diseases that are harmful to humans, including Lyme disease. This image shows an adult female blacklegged tick, or deer tick.
Ticks spread the widest variety of diseases that are harmful to humans, including Lyme disease. This image shows an adult female blacklegged tick, or deer tick.
Myotis septentrionalis, northern myotis (Vespertilionidae) with growth of Geomyces destructans clearly evident.
Myotis septentrionalis, northern myotis (Vespertilionidae) with growth of Geomyces destructans clearly evident.
USGS hydrologist Michael Noll surveying a high-water mark on Ellis Island, New York.
USGS hydrologist Michael Noll surveying a high-water mark on Ellis Island, New York.
USGS hydrologic technician Amy Simonson surveying a high-water mark on Liberty Island, New York.
USGS hydrologic technician Amy Simonson surveying a high-water mark on Liberty Island, New York.
USGS hydrologic technician Amy Simonson surveying a high-water mark on Liberty Island, New York.
USGS hydrologic technician Amy Simonson surveying a high-water mark on Liberty Island, New York.
USGS hydrologic technician Amy Simonson surveying a high-water mark on Liberty Island, New York.
USGS hydrologic technician Amy Simonson surveying a high-water mark on Liberty Island, New York.
USGS hydrologic technician Amy Simonson surveying a high-water mark on Liberty Island, New York.
USGS hydrologic technician Amy Simonson surveying a high-water mark on Liberty Island, New York.
Parasitic mouth of the invasive sea lamprey
Parasitic mouth of the invasive sea lamprey
Oilfield waste arrives by tanker truck at a wastewater disposal facility near Platteville, Colo. After removal of solids and oil, the wastewater is injected into a deep well for permanent storage underground. This disposal process has the potential to trigger earthquakes, but very few wastewater disposal wells produce earthquakes.
Oilfield waste arrives by tanker truck at a wastewater disposal facility near Platteville, Colo. After removal of solids and oil, the wastewater is injected into a deep well for permanent storage underground. This disposal process has the potential to trigger earthquakes, but very few wastewater disposal wells produce earthquakes.
Oilfield waste arrives by tanker truck at a wastewater disposal facility near Platteville, Colo. After removal of solids and oil, the wastewater is injected into a deep well for permanent storage underground. This disposal process has the potential to trigger earthquakes, but very few wastewater disposal wells produce earthquakes.
Oilfield waste arrives by tanker truck at a wastewater disposal facility near Platteville, Colo. After removal of solids and oil, the wastewater is injected into a deep well for permanent storage underground. This disposal process has the potential to trigger earthquakes, but very few wastewater disposal wells produce earthquakes.
CRSP biologists travelled along the Missouri and Mississippi rivers in search of usable boat ramps. Pictured is a ramp located near Cape Girardeau, MO.
CRSP biologists travelled along the Missouri and Mississippi rivers in search of usable boat ramps. Pictured is a ramp located near Cape Girardeau, MO.
CRSP biologists travelled along the Missouri and Mississippi rivers in search of usable boat ramps. Pictured is a ramp Grand Tower, IL.
CRSP biologists travelled along the Missouri and Mississippi rivers in search of usable boat ramps. Pictured is a ramp Grand Tower, IL.
Sand dunes in Avon on Cape Hatteras, NC are the only separation between many beach house communities and the Atlantic Ocean.
Sand dunes in Avon on Cape Hatteras, NC are the only separation between many beach house communities and the Atlantic Ocean.
Clark's grebe sitting on a nest at Thermalito Afterbay, California.
Clark's grebe sitting on a nest at Thermalito Afterbay, California.
Mount Hood in the not-so-far distance beyond downtown Portland, Oregon. Photograph taken at the top of the Portland Aerial Tram line on Marquam Hill.
Mount Hood in the not-so-far distance beyond downtown Portland, Oregon. Photograph taken at the top of the Portland Aerial Tram line on Marquam Hill.
A fish (Gephyroberyx darwinii) peeks through a forest of soft corals and anemones at about 300 meters in depth in the Gulf of Mexico.
A fish (Gephyroberyx darwinii) peeks through a forest of soft corals and anemones at about 300 meters in depth in the Gulf of Mexico.
A conger eel (Conger oceanicus) cruises through a thicket of Lophelia pertusa coral.
A conger eel (Conger oceanicus) cruises through a thicket of Lophelia pertusa coral.