The neural plate or primitive streak of developing pallid sturgeon embryos can be seen 2 days after fertilization.
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Pallid Sturgeon Embryos
The neural plate or primitive streak of developing pallid sturgeon embryos can be seen 2 days after fertilization.
Fertilized Pallid Sturgeon Eggs
Pallid sturgeon embryos approximately 8 hours after fertilization.
Pallid sturgeon embryos approximately 8 hours after fertilization.
Dr. Matthew C. Hansen
Image of Dr. Matthew C. Hansen who is a recipient of a William T. Pecora Award for achievements in Earth remote sensing.
Image of Dr. Matthew C. Hansen who is a recipient of a William T. Pecora Award for achievements in Earth remote sensing.
The Human Side of Things
Angler catches a fish during a Panfish Fishing Tournament on June 6, 2015 on Brownlee Reservoir in Oregon. Fish serve as an important recreational, commercial, and cultural resource in the United States and Canada. Credit: Baker County Tourism
Angler catches a fish during a Panfish Fishing Tournament on June 6, 2015 on Brownlee Reservoir in Oregon. Fish serve as an important recreational, commercial, and cultural resource in the United States and Canada. Credit: Baker County Tourism
San Pedro Riparian National Conservation Area
Photograph showing San Pedro Riparian National Conservation Area, residential development southeast of Sierra Vista, Arizona, and the Huachuca Mountains from Hereford Road, Cochise County, Arizona.
Photograph showing San Pedro Riparian National Conservation Area, residential development southeast of Sierra Vista, Arizona, and the Huachuca Mountains from Hereford Road, Cochise County, Arizona.
Rock Slide in Nepal from an Earthquake in April of 2015
Rock Slide in Nepal from an Earthquake in April of 2015Villagers in Kerauja below a rock slide that resulted from a magnitude 7.8 earthquake on April 25, 2015 in Gorkha district, Nepal.
Rock Slide in Nepal from an Earthquake in April of 2015
Rock Slide in Nepal from an Earthquake in April of 2015Villagers in Kerauja below a rock slide that resulted from a magnitude 7.8 earthquake on April 25, 2015 in Gorkha district, Nepal.
Low-Level Flights in Southeast Missouri Will Look at Geology and Mineral Resources
Low-Level Flights in Southeast Missouri Will Look at Geology and Mineral ResourcesA Piper Navajo airplane with auxiliary wingtip pods and tail stinger magnetometers will study the rocks within the St. Francois Mountains in southeast Missouri.
Low-Level Flights in Southeast Missouri Will Look at Geology and Mineral Resources
Low-Level Flights in Southeast Missouri Will Look at Geology and Mineral ResourcesA Piper Navajo airplane with auxiliary wingtip pods and tail stinger magnetometers will study the rocks within the St. Francois Mountains in southeast Missouri.
Memorial Day Flood in Texas
Road and bridge damage on the Blanco River near Blanco, Texas, from the Memorial Day 2015 Flood.
Road and bridge damage on the Blanco River near Blanco, Texas, from the Memorial Day 2015 Flood.
Biologists Collecting Biological Samples from Grizzly Bear
Biologists Collecting Biological Samples from Grizzly BearUSGS biologists collecting biological information from a grizzly bear they have captured. Biologists collect hair samples for genetic analysis, weigh the bear, and gather numerous measurements of the body, such as the head, paws, claws, teeth, etc. Overall condition of the bear is assessed as well, including a body fat measurement.
Biologists Collecting Biological Samples from Grizzly Bear
Biologists Collecting Biological Samples from Grizzly BearUSGS biologists collecting biological information from a grizzly bear they have captured. Biologists collect hair samples for genetic analysis, weigh the bear, and gather numerous measurements of the body, such as the head, paws, claws, teeth, etc. Overall condition of the bear is assessed as well, including a body fat measurement.
USGS Geologists Inspecting Fault Trace in a Trench
USGS Geologists Inspecting Fault Trace in a TrenchView of geologists pointing to fault in a trench dug across one of the ruptures from the 2014 South Napa earthquake. From front to rear: Alexandra Pickering, Suzanne Hecker, Aaron Page (all USGS). Trench located approximately 3 miles NW of downtown Napa, CA.
USGS Geologists Inspecting Fault Trace in a Trench
USGS Geologists Inspecting Fault Trace in a TrenchView of geologists pointing to fault in a trench dug across one of the ruptures from the 2014 South Napa earthquake. From front to rear: Alexandra Pickering, Suzanne Hecker, Aaron Page (all USGS). Trench located approximately 3 miles NW of downtown Napa, CA.
Blanco River 2015 Memorial Weekend Flood
Picturesque rivers of the Texas Hill Country can turn into raging torrents in the part of Texas known as Flash Flood Alley when storms drop many inches of rain in the river watersheds. This image shows a damaged street sign and flood debris left behind by record flood waters of the Blanco River near Martindale, TX on Memorial weekend, 2015.
Picturesque rivers of the Texas Hill Country can turn into raging torrents in the part of Texas known as Flash Flood Alley when storms drop many inches of rain in the river watersheds. This image shows a damaged street sign and flood debris left behind by record flood waters of the Blanco River near Martindale, TX on Memorial weekend, 2015.
Pallid Sturgeon Larvae
Pallid sturgeon larvae at 14 days post hatch. On agerage, pallid sturgeon transition to active feeding at approximately 16 to 18 millimeters (about 0.7 inch).
Pallid sturgeon larvae at 14 days post hatch. On agerage, pallid sturgeon transition to active feeding at approximately 16 to 18 millimeters (about 0.7 inch).
Pallid Sturgeon Free Embryo
Pallid sturgeon free embryo at 2 days post hatch. At two days after hatching the free embryos are generally 9 to 11 millimeters (0.35 to 0.45 inch).
Pallid sturgeon free embryo at 2 days post hatch. At two days after hatching the free embryos are generally 9 to 11 millimeters (0.35 to 0.45 inch).
Denver Streamflow Monitoring
Tony Trease, USGS Hydrologic Technician, measuring streamflow in the South Platte River outside of Denver, Colo.
Tony Trease, USGS Hydrologic Technician, measuring streamflow in the South Platte River outside of Denver, Colo.
Denver Streamflow Monitoring
Tony Trease, USGS Hydrologic Technician, measuring streamflow in the South Platte River outside of Denver, Colo.
Tony Trease, USGS Hydrologic Technician, measuring streamflow in the South Platte River outside of Denver, Colo.
Night Sky at Cheyenne River
Night sky at USGS streamgage 06408650, Cheyenne River near Scenic, SD.
Night sky at USGS streamgage 06408650, Cheyenne River near Scenic, SD.
Pallid Sturgeon Egg Adhesion
Pallid sturgeon eggs become adhesive minutes after fertilization. Scientists are working to understand the factors that influence the adhesiveness of sturgeon eggs.
Pallid sturgeon eggs become adhesive minutes after fertilization. Scientists are working to understand the factors that influence the adhesiveness of sturgeon eggs.
Maine Cooperative Fish and Wildlife Research Unit Pollinator Research
Maine Cooperative Fish and Wildlife Research Unit Pollinator ResearchA Ph.D. student setting up a trap to capture bees.
Maine Cooperative Fish and Wildlife Research Unit Pollinator Research
Maine Cooperative Fish and Wildlife Research Unit Pollinator ResearchA Ph.D. student setting up a trap to capture bees.
Acoustic Telemetry Transmitter
Acoustic telemetry transmitter used to monitor shovelnose sturgeon and pallid sturgeon during spawning in specially constructed ponds at the Columbia Environmental Research Center.
Acoustic telemetry transmitter used to monitor shovelnose sturgeon and pallid sturgeon during spawning in specially constructed ponds at the Columbia Environmental Research Center.
Giant African Land Snail
A large giant African land snail sitting on a gloved hand. The snail is approximately 8 inches long and covers the entire hand.
A large giant African land snail sitting on a gloved hand. The snail is approximately 8 inches long and covers the entire hand.
Megachile bee on a primrose flower
A Megachile bee on a primrose flower.
A Megachile bee on a primrose flower.