Scientist removes cell growth medium from a 6–well plate in preparation for a plaque assay, which is a test that allows… Free Image from public domain license 
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Scientist testing with virus through test tubes. Original image sourced from US Government department: Public Health Image… Free Image from public domain license 
Microbiologist preparing for antibody testing. A healthcare provider donning a pair of green latex gloves in order to protect… Free Image from public domain license 
Sample of test tubes. A healthcare provider donning a pair of green latex gloves in order to protect herself during her… Free Image from public domain license 
Scientist testing with virus through test tubes. A healthcare provider donning a pair of green latex gloves in order to… Free Image from public domain license 
Operators test the National Aeronautics and Space Administration’s Plum Brook Reactor Facility systems. Original from… Free Image from public domain license 
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Sample of test tubes. A healthcare provider donning a pair of green latex gloves in order to protect herself during her… Free Image from public domain license 
Test Tubes from experimenting on coronavirus. Original image sourced from US Government department: Public Health Image… Free Image from public domain license 
Time-lapse photograph of the Cosmic Infrared Background Experiment (CIBER) rocket launch, taken from NASA's Wallops Flight… Free Image from public domain license 
A woman receiving an influenza vaccination at the Maternal and Child Hospital in Vientiane, Laos. Original image sourced from… Free Image from public domain license 
Construction of the new NASA Ames Green Building dubbed Sustainability Base located on the Ames Research Center campus at… Free Image from public domain license 
NASA/DLR Stratospheric Observatory for Infared Astronomy (SOFIA) 747SP cruises over central Texas on its first checkout… Free Image from public domain license 
Children holding vaccination tube waiting to get vaccinated. Original image sourced from US Government department: Public… Free Image from public domain license 
Aloe from the Lady Bird Johnson Wildflower Center, part of the University of Texas at Austin. Original image from Carol M.… Free Image from public domain license 
Front 3/4 view of the Avrocar. Original from NASA. Digitally enhanced by rawpixel. Free Image from public domain license 
Ship in a storm in the Sargasso Sea. Original from NASA. Digitally enhanced by rawpixel. Free Image from public domain license 
The International Space Station backdropped by Earth’s horizon and the blackness of space. Original from NASA .… Free Image from public domain license 
California’s NASA Armstrong Flight Research Center captures a supermoon, a blue moon and a lunar eclipse at the same… Free Image from public domain license 
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Arrival of the RRS Ernest Shackleton near Halley Research Station in Antarctica, January, 2013. Original from NASA. Digitally… Free Image from public domain license 
The U.S. Air Force's F-16D Automatic Collision Avoidance Technology (ACAT) aircraft cruises during a flight originating from… Free Image from public domain license 
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Beautiful skies prevailed on the evening of the Venus Transit when NASA Glenn brought telescopes to Edgewater Park on Lake… Free Image from public domain license 
NASA's Stratospheric Observatory for Infrared Astronomy (SOFIA) was airborne for almost two hours during its first check… Free Image from public domain license 
The second free-flight test of an evolving series of X-38 prototypes took place July 10, 2001 when the X-38 was released from… Free Image from public domain license 
Russian Search and Rescue teams deploy by helicopter from Karaganda, Kazakhstan. Original from NASA . Digitally enhanced by… Free Image from public domain license 
ATK Solar Array Deployment Test at NASA Plum Brook Station Space Power Facility. Original from NASA. Digitally enhanced by… Free Image from public domain license 
Test Tubes from experimenting on coronavirus. Original image sourced from US Government department: Public Health Image… Free Image from public domain license 
Controlled Impact Demonstration instrumented test dummies installed in plane. Original from NASA. Digitally enhanced by… Free Image from public domain license 
NASA's Stratospheric Observatory for Infrared Astronomy is silhouetted against the sky as it soars on its second check flight… Free Image from public domain license 
The terrain for the scientific work conducted by ICESCAPE scientists on July 4, 2010. Original from NASA. Digitally enhanced… Free Image from public domain license 
Closeup process of ingesting a blood meal from the arm of a voluntary human host. Original image sourced from US Government… Free Image from public domain license 
NASA’s C130 Hercules is a four-engine turboprop. This particular plane was built in 1966, but has been extensively… Free Image from public domain license 
NASA's Stratospheric Observatory for Infrared Astronomy (SOFIA) was airborne for almost two hours during its first check… Free Image from public domain license 
View just before sunrise over the Arctic Ocean during IceBridge's transit flight from Fairbanks to Thule. Original from NASA… Free Image from public domain license 
Zodiak from the tomb of Psammis in Thebes illustration from the kings tombs in Thebes by Giovanni Battista Belzoni (1778… Free Image from public domain license 
Plate 15 : The Apis Bull by Giovanni Battista Belzoni (1778-1823) from Plates illustrative of the researches and operations… Free Image from public domain license 
The heart of the NASA Center for Climate Simulation (NCCS) is the “Discover” supercomputer. Original from NASA.… Free Image from public domain license 
NASA's first large-scale solar power generation facility opens at NASA's Kennedy Space Center in Florida. Original from NASA.… Free Image from public domain license 
Mode in which the young Memnon's head, (now in the British Museum,) was removed illustration from the kings tombs in Thebes… Free Image from public domain license 
Ruins of Ombos illustration from the kings tombs in Thebes by Giovanni Battista Belzoni (1778-1823) from Plates illustrative… Free Image from public domain license 
Local health centers experimenting with coronavirus. Original image sourced from US Government department: Public Health… Free Image from public domain license 
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NASA Launches Eighth Year of Antarctic Ice Change Airborne Survey. Original from NASA . Digitally enhanced by rawpixel. Free Image from public domain license 
Containerized Server at the NASA Ames Research Center. Original from NASA. Digitally enhanced by rawpixel. Free Image from public domain license 
ICESCAPE scientists watched from the deck of the Healy as it cut a path through thick multiyear ice on July 6, 2011. Original… Free Image from public domain license 
Saunders Island and Wolstenholme Fjord with Kap Atholl in the background. Original from NASA. Digitally enhanced by rawpixel. Free Image from public domain license 
Echo Satellite. Original from NASA. Digitally enhanced by rawpixel. Free Image from public domain license 
The NASA DC-8 in a right bank over the rugged Sierra Nevada Mountains. Original from NASA. Digitally enhanced by rawpixel. Free Image from public domain license 
DHC-3 Otter, the plane flown in NASA's Operation IceBridge-Alaska surveys of mountain glaciers in Alaska. Original from NASA.… Free Image from public domain license 
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Test Package Plummets in the Zero Gravity Research Facility at Lewis Research Center, NASA. Original from NASA. Digitally… Free Image from public domain license 
McDonnell F-101A-1-MC Voodoo 53-2418, first production aircraft, parked on Rogers Dry Lake, Edwards AFB. (U.S. Air Force).… Free Image from public domain license 
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With smoke from the Lake Arrowhead area fires streaming in the background, NASA's Ikhana unmanned aircraft heads out on a… Free Image from public domain license 
Hiller rotorcycle YROE-1 hovers in front of the Ames Hangar, June 11th, 1963. Original from NASA. Digitally enhanced by… Free Image from public domain license 
A NASA scientific balloon awaits launch in McMurdo, Antarctica. Original from NASA. Digitally enhanced by rawpixel. Free Image from public domain license 
The Helios Prototype is an enlarged version of the Centurion flying wing, which flew a series of test flights at Dryden in… Free Image from public domain license 
Ship in a storm in the Sargasso Sea. Original from NASA. Digitally enhanced by rawpixel. Free Image from public domain license 
New NASA laser technology reveals how ice measures up. Original from NASA. Digitally enhanced by rawpixel. Free Image from public domain license 
NASA Twin Otter aircraft in flight over northern Ohio. Original from NASA. Digitally enhanced by rawpixel. Free Image from public domain license 
The Dryden Aircraft Operations Facility in Palmdale, Calif., is now home to two large science aircraft, NASA's SOFIA… Free Image from public domain license 
SCAT-16; Variable Sweep Model in 40x80 Wind Tunnel at NASA Ames. 3/4 view of model in cruise configuration with 25 deg.… Free Image from public domain license 
North American Aviation A-5A Vigilante arrived from the Naval Air Test Center to the NASA Flight Research Center. Original… Free Image from public domain license 
Lightning strikes in the distance as the Space Shuttle Discovery receives post-flight processing in the Mate-Demate Device.… Free Image from public domain license 
NASA's highly modified Boeing 747SP SOFIA observatory banks low over the Texas countryside as it heads for landing at Waco to… Free Image from public domain license 
The International Space Station’s Canadarm2 prepares to release the Orbital Sciences' Cygnus commercial cargo craft… Free Image from public domain license 
Emblematic Figures illustration from the kings tombs in Thebes by Giovanni Battista Belzoni (1778-1823) from Plates… Free Image from public domain license 
View of the interior of the temple in the Isle of Philoe illustration from the kings tombs in Thebes by Giovanni Battista… Free Image from public domain license 
Exterior View of the Temple of Ybsambul illustration from the kings tombs in Thebes by Giovanni Battista Belzoni (1778-1823)… Free Image from public domain license 
An amber–colored glass ashtray filled with used cigarette butts along with their ashes. Original image sourced from US… Free Image from public domain license 
Photos of the Launch Vehicle Data Center in Hangar AE - Room 1 of LVDC. Original from NASA . Digitally enhanced by rawpixel. Free Image from public domain license 
Plate 13 : Sacrifice of the Bull by Giovanni Battista Belzoni (1778-1823) from Plates illustrative of the researches and… Free Image from public domain license 
A ruby–colored glass ashtray contained three used cigarette butts along with their ashes. A healthcare provider donning… Free Image from public domain license 
The flight deck of space shuttle Endeavour is illuminated during Space Shuttle Program transition and retirement activities.… Free Image from public domain license 
NASA Glenn's new LED solar simulator was developed by Angstrom Designs and UC Santa Barbara to test the next generation of… Free Image from public domain license 
At NASA Kennedy Space Center's Visitor Complex, Star Trek memorabilia is being displayed. Original from NASA . Digitally… Free Image from public domain license 
The U.S. Coast Guard Cutter Healy encountered only small patches of sea ice in the Chukchi Sea during the final days… Free Image from public domain license 
Light Microscopy Microscope Experiment. The particles in the tube glow orange because they have been fluorescently tagged… Free Image from public domain license 
A view inside the 55-foot high containment vessel of the National Aeronautics and Space Administration (NASA) Plum Brook… Free Image from public domain license 
'Fluid Dynamics,' mixed media by Tina York depicts fluid dynamics studies at the Ames Research Center. Original from NASA.… Free Image from public domain license 
Bioreactor Demonstration System (BDS) comprises an electronics module, a gas supply module, and the incubator module housing… Free Image from public domain license 
NASA's SOFIA airborne observatory lands at Edwards AFB. Original from NASA. Digitally enhanced by rawpixel. Free Image from public domain license 
NASA's Boeing 747SP SOFIA airborne observatory soars over a bed of puffy clouds during its second checkout flight over the… Free Image from public domain license 
The Lunar Landing Research Vehicle (LLRV) number 1 in flight, December 9, 1964. Original from NASA. Digitally enhanced by… Free Image from public domain license 
September 11th remembrance ceremony held in front of NASA Research Park Bldg-17. Original from NASA . Digitally enhanced by… Free Image from public domain license 
NASA's DC-8 Airborne Science platform shown against a background of a dark blue sky on February 20, 1998. Original from NASA… Free Image from public domain license 
The space shuttle Atlantis atop NASA's 747 Shuttle Carrier Aircraft (SCA) during takeoff for a return ferry flight to the… Free Image from public domain license 
In Orbiter Processing Facility-2 at NASA’s Kennedy Space Center in Florida, the consoles on space shuttle… Free Image from public domain license 
The Air Force provided a C-17 Globemaster III for use in the Vehicle Integrated Propulsion Research (VIPR) effort. Original… Free Image from public domain license 
In Orbiter Processing Facility-2 at NASA's Kennedy Space Center in Florida, the flight deck of space shuttle Atlantis is lit… Free Image from public domain license 
The cavernous expanse of the Dryden Aircraft Operations Facility in Palmdale, Calif., now houses NASA's DC-8 science… Free Image from public domain license 
X-15A-2 in flight. First flight with dummy ramjet attached, at 8 May 1967. Original from NASA. Digitally enhanced by… Free Image from public domain license 
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California’s NASA Armstrong Flight Research Center captures a supermoon, a blue moon and a lunar eclipse at the same… Free Image from public domain license 
Hypersonic Transport Model. High 3/4 top front view of model in Ames 40x80 foot wind tunnel. Bob Bishop in lower right. Delta… Free Image from public domain license 
Boundary Layer Ingestion. Original from NASA. Digitally enhanced by rawpixel. Free Image from public domain license 
The Fuel Burner Rig is a test laboratory at NASA Glenn. These samples face 200-mile per hour flames to simulate the… Free Image from public domain license