b+ grade text on a white paper - red marker - a b testing stock videos & royalty-free footage00:05B+ grade text on a white paper - red markerReport Card, Letter B, Education
b&w cu changing image of human brain on mri scan / burlington, vermont, usa - a b testing stock videos & royalty-free footage00:10B&W CU Changing image of human brain on MRI scan / Burlington, Vermont, USAMRI Scan, Medical Test, Human Brain
b-roll of an unrecognizable scientist, sampling with a sample bottle the water from city river for analysis - a b testing stock videos & royalty-free footage00:08B-roll of an unrecognizable scientist, sampling with a sample bottle the water from city river for analysisWater, River, Research
check box office b - a b testing stock videos & royalty-free footage00:23Check box office BChecklist, Questionnaire, Obedience
b/w 1915 close up mad scientist wearing surgical mask holding test tube with smoke emerging / silent serial - a b testing stock videos & royalty-free footage00:04B/W 1915 close up mad scientist wearing surgical mask holding test tube with smoke emerging / silent serialScientist, Laboratory, Archival
female pediatrician using tongue depressor, while examining the toddler's throat - a b testing stock videos & royalty-free footage00:18Female pediatrician using tongue depressor, while examining the toddler's throatDoctor, Examining, Child
b grade text on a white paper - black marker - a b testing stock videos & royalty-free footage00:05B grade text on a white paper - black markerReport Card, Letter B, Improvement
b grade text on a white paper - red marker - a b testing stock videos & royalty-free footage00:05B grade text on a white paper - red markerLetter B, Report Card
unrecognizable female patient holding a spit collector for a cancer screening test - a b testing stock videos & royalty-free footage00:16Unrecognizable female patient holding a spit collector for a cancer screening testMedical Test, Telomere, DNA
caucasian pediatrician using tongue depressor, while examining the toddler's throat - a b testing stock videos & royalty-free footage00:28Caucasian pediatrician using tongue depressor, while examining the toddler's throatExamining, Doctor, Child
b/w 1965 man with eyeglasses looking at tubes in scientific lab - a b testing stock videos & royalty-free footage00:01B/W 1965 man with eyeglasses looking at tubes in scientific labScientist, Science, Research
unrecognizable microbiology scientist, sampling with a sample bottle the water from city river for analysis - a b testing stock videos & royalty-free footage00:09Unrecognizable microbiology scientist, sampling with a sample bottle the water from city river for analysisWater, Medical Sample, Scientist
in space-february 6, 2020: clean, color corrected, and broadcast-safe clip of astronaut christina koch in the international space station during... - a b testing stock videos & royalty-free footage00:22Astronaut Christina Koch in Space, B-rollIndoors, International Space Station
child and his father, who said they did not mind being photographed, undergo a rapid antigen test for covid 19 at a coronavirus testing station in a... - a b testing stock videos & royalty-free footage00:14Berlin Launches Shopping With Same-Day Covid TestsCoronavirus, Child
aug-1939 b/w montage germans have built a defense line made of concrete fortifications, bunkers and other reinforcements, adolf hitler inspects the... - a b testing stock videos & royalty-free footage00:3219-Aug-1939 B/W MONTAGE Germans have built a defense line made of concrete fortifications, bunkers and other reinforcements, Adolf Hitler inspects the Siegfried line / GermanyNazism, Bomb Shelter, Examining
because of its proximity to lyndon b johnson space center, eafb was used by nasa for astronaut flight training / astronaut neil armstrong, who was... - a b testing stock videos & royalty-free footage00:41Wreckage of a NASA lunar landing vehicle at Ellington Air Force Base.Apollo Space Mission, Crash, NASA
1949 b/w montage wheat and grapes fermenting in beakers, usa, audio - a b testing stock videos & royalty-free footage00:341949 B/W MONTAGE Wheat and grapes fermenting in beakers, USA, AUDIOClose-up, Beaker, Carbon Dioxide
unrecognizable auto mechanic measuring the motor oil level with the wire - a b testing stock videos & royalty-free footage00:12Unrecognizable auto mechanic measuring the motor oil level with the wireCar, Examining, Motor Oil
sequence showing the cabin and cockpit of a prototype bristol brabazon passenger aircraft. - a b testing stock videos & royalty-free footage00:21Sequence showing the cabin and cockpit of a prototype Bristol Brabazon passenger aircraft.Commercial Airplane
sequence showing a prototype bristol brabazon passenger aircraft taxiing of a runway at london airport. - a b testing stock videos & royalty-free footage00:25Sequence showing a prototype Bristol Brabazon passenger aircraft taxiing of a runway at London Airport.
initial blast, wilson cloud , and emerging mushroom cloud up into sky / front half of b-29 dave's dream with bomb bay doors open / inside: bombardier... - a b testing stock videos & royalty-free footage01:50Atomic bomb named "Gilda," first bomb in US Operation Crossroads nuclear weapon tests, detonates at Bikini AtollAtomic Bomb, Bombardier, 1940-1949
b/w 1965 close up boiling bunsen burner in lab - a b testing stock videos & royalty-free footage00:01B/W 1965 close up boiling bunsen burner in labLaboratory
b/w 1915 extreme close up hand turning test tube with smoke emerging / silent serial - a b testing stock videos & royalty-free footage00:02B/W 1915 extreme close up hand turning test tube with smoke emerging / silent serialInventor, Scientist, Black And White
close up of lab technician in gloves pouring yellow urine specimen into numbered glass test tubes for clinical urinalysis, renal diagnostics pathology healthcare nature documentary b roll footage, 4k uhd resolution. - a b testing stock videos & royalty-free footage00:05Close Up of Lab Technician in Gloves Pouring Yellow Urine Specimen into Numbered Glass Test Tubes for Clinical Urinalysis, Renal Diagnostics Pathology Healthcare Nature Documentary B Roll Footage, 4K UHD Resolution.
"supersonic rocket ship: makes fastest, highest flight!" superimposed over douglas d-558 "skyrocket" u.s navy jet-rocket-research-supersonic plane,... - a b testing stock videos & royalty-free footage00:52Douglas "Skyrocket" flies fastest and highest after its test flightCockpit
experiments on the equilibrium chair on september 26, 1947 in the united states of america. the b-roll is part of the department of defense and... - a b testing stock videos & royalty-free footage00:27Research at the Aerospace Medical Division, USAHealthcare And Medicine
hypodynamic experiment on september 26, 1947 in the united states of america. the b-roll is part of the department of defense and department of the... - a b testing stock videos & royalty-free footage02:16Research at the Aerospace Medical Division, USAHealthcare And Medicine, Archival, People
seat ejection on september 26, 1947 in the united states of america. the b-roll is part of the department of defense and department of the air force... - a b testing stock videos & royalty-free footage02:16Research at the Aerospace Medical Division, USAUSA
vertical accelerator test machine on september 26, 1947 in the united states of america. the b-roll is part of the department of defense and... - a b testing stock videos & royalty-free footage00:20Research at the Aerospace Medical Division, USAHealthcare And Medicine, USA
incline impact test facility on september 26, 1947 in the united states of america. the b-roll is part of the department of defense and department of... - a b testing stock videos & royalty-free footage01:55Research at the Aerospace Medical Division, USAMedical Test, Healthcare And Medicine
vertical deceleration tower on september 26, 1947 in the united states of america. the b-roll is part of the department of defense and department of... - a b testing stock videos & royalty-free footage00:59Research at the Aerospace Medical Division, USAHealthcare And Medicine, USA
medical worker conducts a rapid antigen test at a covid-19 testing station in a makeshift tent in front of a pharmacy on the first day that a... - a b testing stock videos & royalty-free footage00:10Berlin Launches Shopping With Same-Day Covid TestsGermany, Coronavirus
shadow of laboratory reconstruction against tiled wall - a b testing stock videos & royalty-free footage00:10Shadow of laboratory reconstruction against tiled wallHistorical Reenactment
1900s b/w montage thomas edison works in his lab and turns on light bulb / united states - a b testing stock videos & royalty-free footage00:091900s B/W MONTAGE Thomas Edison works in his lab and turns on light bulb / United StatesThomas Edison, Light Bulb, Electricity
1930s b/w scientist using a microscope - a b testing stock videos & royalty-free footage00:051930s B/W Scientist using a microscopeBlack And White, Archival, Examining
newsreel / atom bomb no 4, zero hour near for pacific test / operation crossroads / b-29 bomber in the air, crew aiming / explosion over the ocean,... - a b testing stock videos & royalty-free footage00:38Atom Bomb No 4, Zero Hour Near for Pacific Test 5Atom, Atomic Bomb
b/w mad scientist preparing to experiment on woman strapped to table - a b testing stock videos & royalty-free footage00:02B/W mad scientist preparing to experiment on woman strapped to tableMad Scientist, Laboratory, Monster - Fictional Character
unrecognizable female dermatologist examining patient for signs of skin cancer - a b testing stock videos & royalty-free footage00:05Unrecognizable female dermatologist examining patient for signs of skin cancerExamining, Close-up, Patient
view thru circular window of atomic bomb explosion during test / nevada / documentary - a b testing stock videos & royalty-free footage00:03B/W 1955 view thru circular window of atomic bomb explosion during test / Nevada / documentaryNuclear Weapons Testing, Nuclear Weapon, Atomic Bomb
test pilots testing parachutes, jet packs, rocket launches, training on trampoline, performing various altitude, pressurization, depressurization,... - a b testing stock videos & royalty-free footage01:111960's B/W MONTAGE Space equipment testing and training of cosmonauts / Russia G Force, Medical Exam, Sports Training
fighter jet in sky, a missile under wing / interior cockpit: pilot's hand on stick presses button / exterior missile fires and takes off from under... - a b testing stock videos & royalty-free footage00:49Successful tests of US Navy's supersonic guided air-to-air missile, the AIM-7 SparrowMissile, Drone, Violence
1915 montage b/w disabled soldiers trying on artifical limbs and prosthetic legs for examination/ russia - a b testing stock videos & royalty-free footage01:051915 MONTAGE B/W Disabled soldiers trying on artifical limbs and prosthetic legs for examination/ RussiaArmy Soldier, Medical Test
sailors aboard uss fall river sit on deck, cover eyes with arms and lower heads to knees / from above: crew on bow seated with heads bowed / vs... - a b testing stock videos & royalty-free footage01:05Atomic bomb named "Gilda," first bomb in Operation Crossroads nuclear weapon tests at Bikini Atoll by United States militaryBombardier, 1940-1949, Atomic Bomb
airmen work on, around, under b-29 of the 509th bombardment group / "dave's dream" painted on side over number 7354, two airmen stand atop nose /... - a b testing stock videos & royalty-free footage00:58US B-29 Superfortress "Dave's Dream" to drop Gilda, first test atomic bomb in Operation Crossroads, over Bikini AtollAtomic Bomb, Bomb
buildings at kitty hawk, north carolina. wind tunnel, preliminary data numbers on columned paper, coast guards in uniform, vs several wright gliders.... - a b testing stock videos & royalty-free footage01:001902: THE WRIGHT BROTHERS: B/W PHOTOS: Buildings at Kitty Hawk, North Carolina. CU ZO MS Wind tunnel, CU Preliminary data numbers on columned paper, MS Coast Guards in uniform, VS Several Wright gliders. Aviation pioneers.
superfortress dave's dream in flight / radio broadcaster attempts to describe tests / crowds gather around radios to listen / metronome ticks away on... - a b testing stock videos & royalty-free footage00:30Interference Disrupts Radio Broadcast of Bikini Atoll Atomic TestListening, Cold War, Crowd of People
inscription on b-29 airplane "dave's dream," which will carry the operation crossroads bomb / plane with military personnel preparing it and loading... - a b testing stock videos & royalty-free footage00:19Plane "Dave's Dream" prepared for 1946 Operation Crossroads bomb drop at Bikini AtollAtomic Bomb
airplane "dave's dream" flies in sky en route to dropping bomb on discarded warships at bikini atoll in operation crossroads / bombardier major... - a b testing stock videos & royalty-free footage00:20"Dave's Dream" B-29 airplane prepares to drop bomb on Bikini Atoll during 1946 Operation Crossroads projectAtomic Bomb, Bombardier, 1940-1949
pan right of a b-25 doing a belly landing / quick pan right of emergency vehicles speeding to the landing site / long shot of crew exiting the bomber... - a b testing stock videos & royalty-free footage01:23F-51s perform in the Korean WarBomb, Crash Site, Educational Exam
b/w 1958 scientist in lab examines body on table as senior man watches - a b testing stock videos & royalty-free footage00:08B/W 1958 scientist in lab examines body on table as senior man watchesScience, Horror, Black And White
b/w 1948? pan three male scientists working in laboratory amidst many glass bottles - a b testing stock videos & royalty-free footage00:20B/W 1948? PAN three male scientists working in laboratory amidst many glass bottlesScientist, Laboratory, Archival
healthcare worker takes a blood sample from a man’s finger during free and anonymous rapid tests for hiv and hepatitis b and c on december 2, 2025 in... - a b testing stock videos & royalty-free footage00:11Ukrainians Undergo Testing For HIV And Hepatitis B And CAIDS Test, HIV, Medical Test
japanese h-2b rocket fired into orbit on wednesday , september 25, from the tanegashima space center with an automated cargo freighter loaded with... - a b testing stock videos & royalty-free footage01:20Japan: Unmanned Cargo Ship Blasts Off Toward Space Station 4Japan
b/w high angle of astronaut in g-force test - a b testing stock videos & royalty-free footage00:02B/W high angle of astronaut in g-force testAstronaut, Astronaut Training, G Force
boy mannequin by window of house during atomic bomb explosion test - a b testing stock videos & royalty-free footage00:02B/W 1955 SOLARIZED boy mannequin by window of house during atomic bomb explosion testNevada, Bomb, Mannequin
high angle house exploding during atomic bomb explosion test / nevada - a b testing stock videos & royalty-free footage00:04B/W 1955 SOLARIZED high angle house exploding during atomic bomb explosion test / NevadaNuclear Weapons Testing, House, Bomb
close up soldier bent over shielding face during atomic testing / nevada / documentary - a b testing stock videos & royalty-free footage00:01B/W 1955 close up soldier bent over shielding face during atomic testing / Nevada / documentaryNuclear Weapon, USA, News Event
child mannequin in house with brightening light of atomic explosion test - a b testing stock videos & royalty-free footage00:03B/W 1955 SOLARIZED child mannequin in house with brightening light of atomic explosion testNevada, Bomb, Mannequin
race car driver driving experimental race car on daytona beach - a b testing stock videos & royalty-free footage00:07B/W 1935 PAN race car driver driving experimental race car (Bluebird) on Daytona Beach1935
b/w 1929 men in headsets testing radios in factory / philadelphia / industrial - a b testing stock videos & royalty-free footage00:06B/W 1929 men in headsets testing radios in factory / Philadelphia / industrial1920-1929, USA, Radio
. - a b testing stock videos & royalty-free footage00:04B/W 1920s Marie Curie working in laboratory / newsreelLaboratory, Scientist
. - a b testing stock videos & royalty-free footage00:03B/W 1900s 2 men working with chemicals in laboratory / documentaryLaboratory, Science
refutes cold fusion study; b)england: oxon: harwell research lab:intgvs gamma alarm monitorpan up electrical wiresprof david williams interview sot-... - a b testing stock videos & royalty-free footage01:10UKAEA refutes cold fusion study
winemaker working checking using a digital tablet and note b at a winery, slow motion, - a b testing stock videos & royalty-free footage00:11Winemaker working checking using a digital tablet and Note b at a winery, Slow Motion,Factory, Examining, Control
ms sample applied to red petri dish in lab; 1991 - a b testing stock videos & royalty-free footage00:07MS sample applied to red petri dish in lab; 1991Petri Dish, Scientist, Medical Test
mature man screen concentration b - a b testing stock videos & royalty-free footage00:24Mature man screen concentration BDiscovery, Business, Journalism
mark of wholesome meat, part 18b of 40 - a b testing stock videos & royalty-free footage00:38A Mark of Wholesome Meat, part 18b of 40Quality Control, Examining
mid-adult caucasian plumber, repairing the water pipes - a b testing stock videos & royalty-free footage00:15Mid-adult Caucasian plumber, repairing the water pipesTechnician, Examining, Water Pipe
in space-february 6, 2020: clean, color corrected, and broadcast-safe clip of astronaut christina koch in the international space station during... - a b testing stock videos & royalty-free footage00:42Astronaut Christina Koch in Space, B-rollInternational Space Station, Indoors, Global
in space-february 6, 2020: clean, color corrected, and broadcast-safe clip of astronaut christina koch in the international space station during... - a b testing stock videos & royalty-free footage00:07Astronaut Christina Koch in Space, B-rollInternational Space Station, Indoors, Astronaut
in space-february 6, 2020: clean, color corrected, and broadcast-safe clip of astronaut christina koch in the international space station during... - a b testing stock videos & royalty-free footage00:10Astronaut Christina Koch in Space, B-rollAstronaut, International Space Station, Global
in space-february 6, 2020: clean, color corrected, and broadcast-safe clip of astronaut christina koch in the international space station during... - a b testing stock videos & royalty-free footage00:23Astronaut Christina Koch in Space, B-rollInternational Space Station, Astronaut, NASA
in space-february 6, 2020: clean, color corrected, and broadcast-safe clip of astronaut christina koch in the international space station during... - a b testing stock videos & royalty-free footage00:25Astronaut Christina Koch in Space, B-rollIndoors, International Space Station, Global
in space-february 6, 2020: clean, color corrected, and broadcast-safe clip of astronaut christina koch in the international space station during... - a b testing stock videos & royalty-free footage00:10Astronaut Christina Koch in Space, B-rollIndoors, Global
in space-february 6, 2020: clean, color corrected, and broadcast-safe clip of astronaut christina koch in the international space station during... - a b testing stock videos & royalty-free footage00:14Astronaut Christina Koch in Space, B-rollInternational Space Station
antibody test introduced by national blood transfusion service; b) england: london: edgware national blood transfusion service:three male patients... - a b testing stock videos & royalty-free footage00:13AIDS antibody test introduced by National Blood Transfusion ServiceAIDS, AIDS Test, Blood Donation
airbus / concorde on show:; b:france: toulouse:extms dixon: sof:"with 500... - a b testing stock videos & royalty-free footage02:41Toulouse: Airbus / Concorde on show:British Aerospace Concorde, Examining, 1970-1979
solovki labor camp, prisoners come before camp committee / solovetsky island, russia - a b testing stock videos & royalty-free footage00:261928 B/W MONTAGE Solovki labor camp, prisoners come before camp committee / Solovetsky Island, RussiaGulag, Prisoner, Examining
a scientist uses a paintbrush to disturb the contents of illuminated green trays in a laboratory. - a b testing stock videos & royalty-free footage00:20A scientist uses a paintbrush to disturb the contents of illuminated green trays in a laboratory.Laboratory, Bright