Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Explore our planet through photography and imagery, including climate change and water all the way back to the 1800s when the USGS was surveying the country by horse and buggy.
Eosin-nigrosin staining of spermatozoa from common carp (Cyprinus carpio) testes collected from the Lake Mead National Recreation Area, Nevada
Eosin-nigrosin staining of spermatozoa from common carp (Cyprinus carpio) testes collected from the Lake Mead National Recreation Area, Nevada
Keith A. Loftin, USGS, is the lead scientist for algal and cyanobacterial toxins
Keith A. Loftin, USGS, is the lead scientist for algal and cyanobacterial toxins
Microscopic video imaging is used for computerized analysis of sperm motility parameters
Microscopic video imaging is used for computerized analysis of sperm motility parameters
Molecular Devices ImageXpress† High-Content Imaging System
Molecular Devices ImageXpress† High-Content Imaging System
Molecular Devices ImageXpress† High-Content Imaging System that can generate more than 25,000 images in less than 5 hours of automated image acquisition.
Molecular Devices ImageXpress† High-Content Imaging System that can generate more than 25,000 images in less than 5 hours of automated image acquisition.
Tablet-enabled field forms have been developed to help coordinate field efforts, collect site information, GPS coordinates, photos, and control data collection.
Tablet-enabled field forms have been developed to help coordinate field efforts, collect site information, GPS coordinates, photos, and control data collection.
USGS scientists evaluating the nebulizer assembly in a mixed mode ionization source of a triple quadrupole mass spectrometer used to measure individual cyanotoxins
USGS scientists evaluating the nebulizer assembly in a mixed mode ionization source of a triple quadrupole mass spectrometer used to measure individual cyanotoxins
Using the 384-well plate format, a single zebrafish embryo is tested in each well. This is an example of a 72 hour post fertilization fli1:egfp zebrafish (3 millimeters long) imaged under a fluorescein isothiocyanate (FITC) filter.
Using the 384-well plate format, a single zebrafish embryo is tested in each well. This is an example of a 72 hour post fertilization fli1:egfp zebrafish (3 millimeters long) imaged under a fluorescein isothiocyanate (FITC) filter.
Leidy Creek near Moran (13012465) streamgage
An otolith, sometimes called “earstone,” of a bloater, a small prey fish in the Great Lakes. Fishery scientists interpret the age of bloater and other fishes by counting annual growth rings on their otoliths.
An otolith, sometimes called “earstone,” of a bloater, a small prey fish in the Great Lakes. Fishery scientists interpret the age of bloater and other fishes by counting annual growth rings on their otoliths.
South Fork Spread Creek near Moran (13012475) streamgage
South Fork Spread Creek near Moran (13012475) streamgage
USGS hydrologic technician Rob Forde flags a high water mark above the eaves at Presbyterian Church of the Covenant, 118 Manchester Road, Spring Hill, North Carolina on Sept. 21, 2018, in the wake of flooding brought on by Hurricane Florence.
USGS hydrologic technician Rob Forde flags a high water mark above the eaves at Presbyterian Church of the Covenant, 118 Manchester Road, Spring Hill, North Carolina on Sept. 21, 2018, in the wake of flooding brought on by Hurricane Florence.
Biologists from the USGS and Nature Conservancy identify a small fish captured during a September electrofishing survey on a tributary to Follensby Pond, Adirondack Mountains, New York
Biologists from the USGS and Nature Conservancy identify a small fish captured during a September electrofishing survey on a tributary to Follensby Pond, Adirondack Mountains, New York
Field of Phragmites near Cedar Point, Ohio.
Field of Phragmites near Cedar Point, Ohio.
Grand Teton National Park in autumn.
Upper Left: Dann Blackwood operating the SEABOSS winch during a sampling cruise; Lower left: Bill Schwab, Laura Brothers and Emile Bergeron on the deck of a research vessel; Center Left: Tom O'Brien carrying equipment during a research cruise; Center: USGS staff deploying a seismic system from a research vessel; left: Chuck Worley ready to deploy a multibeam e
Upper Left: Dann Blackwood operating the SEABOSS winch during a sampling cruise; Lower left: Bill Schwab, Laura Brothers and Emile Bergeron on the deck of a research vessel; Center Left: Tom O'Brien carrying equipment during a research cruise; Center: USGS staff deploying a seismic system from a research vessel; left: Chuck Worley ready to deploy a multibeam e
Otoliths are located directly behind the brain of bony fishes. On the young alewife shown here, the approximate location of the otoliths is noted with a yellow arrow.
Otoliths are located directly behind the brain of bony fishes. On the young alewife shown here, the approximate location of the otoliths is noted with a yellow arrow.
This aerial view of the western part of Kīlauea Volcano's caldera was taken on August 6, 2018. The down-dropped block is faulted about 120 m (400 feet) below the caldera floor. Many 19th-century lava flows are exposed in the fault scarps. Halema‘uma‘u (not visible) is to the left of this photo. USGS photo by D.Swanson.
This aerial view of the western part of Kīlauea Volcano's caldera was taken on August 6, 2018. The down-dropped block is faulted about 120 m (400 feet) below the caldera floor. Many 19th-century lava flows are exposed in the fault scarps. Halema‘uma‘u (not visible) is to the left of this photo. USGS photo by D.Swanson.
Skinny Common Murre with keel protruding. Lower Cook Inlet, Alaska
Skinny Common Murre with keel protruding. Lower Cook Inlet, Alaska
ECCC Robot Assisted Vision Slide Two
ECCC Robot Assisted Vision Slide Two
The untreated non-native Phragmites plant (left) appears healthy; the organically treated plants (right) appear dead.
The untreated non-native Phragmites plant (left) appears healthy; the organically treated plants (right) appear dead.