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    Close-up of pharmaceutical examining filling of medical pill. — Stock Photo
    Close-up of pharmaceutical examining filling of medical pill.
    Close-up of two-colored medicine capsule in tweezers above petri dish, pharmaceutical research. — Stock Photo
    Close-up of two-colored medicine capsule in tweezers above petri dish, pharmaceutical research.
    Student examining control system wiring on furnace in HVAC classroom with one student in wheelchair — Stock Photo
    Student examining control system wiring on furnace in HVAC classroom with one student in wheelchair
    Instructor demonstrating air conditioner high pressure line to student in wheelchair in HVAC classroom — Stock Photo
    Instructor demonstrating air conditioner high pressure line to student in wheelchair in HVAC classroom
    Archaeologist analyzing ancient artifact in laboratory. — Stock Photo
    Archaeologist analyzing ancient artifact in laboratory.
    Chamomile flowers, thyme, elderflowers and sage on stacked petri dishes, botanical research concept. — Stock Photo
    Chamomile flowers, thyme, elderflowers and sage on stacked petri dishes, botanical research concept.
    Instructor discussing air conditioner recharging with student in wheelchair in HVAC classroom — Stock Photo
    Instructor discussing air conditioner recharging with student in wheelchair in HVAC classroom
    Midsection of archaeologist analyzing charred wood in petri dish. — Stock Photo
    Midsection of archaeologist analyzing charred wood in petri dish.
    Male archaeologist putting ancient weight in plastic bag, female archaeologist marking artifact with serial number. — Stock Photo
    Male archaeologist putting ancient weight in plastic bag, female archaeologist marking artifact with serial number.
    Portrait of young female archaeologist analyzing charred wood in petri dish. — Stock Photo
    Portrait of young female archaeologist analyzing charred wood in petri dish.
    Microbiologist taking bacterial sample on microscope slide. — Stock Photo
    Microbiologist taking bacterial sample on microscope slide.
    Hands of archaeologist analyzing charred wood in petri dish. — Stock Photo
    Hands of archaeologist analyzing charred wood in petri dish.
    Petri dish with culture and bottles of liquid in laboratory, microbiology research concept. — Stock Photo
    Petri dish with culture and bottles of liquid in laboratory, microbiology research concept.
    Engineer walking by water treatment plant ultraviolet ionization treatment room — Stock Photo
    Engineer walking by water treatment plant ultraviolet ionization treatment room
    Microbiologist working with petri dish and test tubes in laboratory. — Stock Photo
    Microbiologist working with petri dish and test tubes in laboratory.
    Archaeologist measuring ancient loom weights on digital scale in laboratory. — Stock Photo
    Archaeologist measuring ancient loom weights on digital scale in laboratory.
    Archaeologists analyzing ancient artifacts in laboratory. — Stock Photo
    Archaeologists analyzing ancient artifacts in laboratory.
    Midsection of archaeologists comparing pottery colors with color chart scheme in laboratory. — Stock Photo
    Midsection of archaeologists comparing pottery colors with color chart scheme in laboratory.
    Archaeologists analyzing ancient fishing weight artifacts. — Stock Photo
    Archaeologists analyzing ancient fishing weight artifacts.
    Hands of archaeologists reconstructing broken pottery in laboratory. — Stock Photo
    Hands of archaeologists reconstructing broken pottery in laboratory.
    Close-up of archaeology researcher documenting lithics with camera in laboratory. — Stock Photo
    Close-up of archaeology researcher documenting lithics with camera in laboratory.
    Chamomile flowers, thyme, elderflowers, lime tree leaves and sage on stacked petri dishes, botanical research concept. — Stock Photo
    Chamomile flowers, thyme, elderflowers, lime tree leaves and sage on stacked petri dishes, botanical research concept.
    Archaeology researchers in laboratory reconstructing usage of ancient axe tool. — Stock Photo
    Archaeology researchers in laboratory reconstructing usage of ancient axe tool.
    Water department engineer standing in chemical treatment room — Stock Photo
    Water department engineer standing in chemical treatment room
    Female scientist pipetting sample into microcentrifuge tubes ready for automated analysis while biotechnology research. — Stock Photo
    Female scientist pipetting sample into microcentrifuge tubes ready for automated analysis while biotechnology research.
    Water treatment plant ultraviolet ionization treatment room — Stock Photo
    Water treatment plant ultraviolet ionization treatment room
    Student in wheelchair examining furnace fuel flow controls in HVAC classroom — Stock Photo
    Student in wheelchair examining furnace fuel flow controls in HVAC classroom
    Scientist examining bacterial sample under microscope. — Stock Photo
    Scientist examining bacterial sample under microscope.
    Variety of pharmacological pills in disposable plastic cups, medication concept. — Stock Photo
    Variety of pharmacological pills in disposable plastic cups, medication concept.
    Instructor discussing fuel mixture controls for furnace in HVAC classroom while one student in wheelchair taking notes — Stock Photo
    Instructor discussing fuel mixture controls for furnace in HVAC classroom while one student in wheelchair taking notes
    Instructor demonstrating air conditioner recharging manifold with gauges in HVAC classroom student in wheelchair — Stock Photo
    Instructor demonstrating air conditioner recharging manifold with gauges in HVAC classroom student in wheelchair
    Chamomile flowers, thyme, elderflowers, lime tree leaves and sage on stacked petri dishes, botanical research concept. — Stock Photo
    Chamomile flowers, thyme, elderflowers, lime tree leaves and sage on stacked petri dishes, botanical research concept.
    Water department engineer standing in chemical treatment room — Stock Photo
    Water department engineer standing in chemical treatment room
    Portrait of young female archaeologist working with microscope. — Stock Photo
    Portrait of young female archaeologist working with microscope.
    Pharmaceutical variety of medicine capsules in petri dishes. — Stock Photo
    Pharmaceutical variety of medicine capsules in petri dishes.
    Students examining condenser coil on refrigeration unit in HVAC classroom — Stock Photo
    Students examining condenser coil on refrigeration unit in HVAC classroom
    Close-up of pharmaceutical examining filling of medical pill. — Stock Photo
    Close-up of pharmaceutical examining filling of medical pill.
    Young archaeology researchers documenting lithics with camera in laboratory and taking notes. — Stock Photo
    Young archaeology researchers documenting lithics with camera in laboratory and taking notes.
    Midsection of archaeologist reconstructing broken pottery in laboratory. — Stock Photo
    Midsection of archaeologist reconstructing broken pottery in laboratory.
    Student in wheelchair examining air conditioner high pressure line in HVAC classroom — Stock Photo
    Student in wheelchair examining air conditioner high pressure line in HVAC classroom
    Archaeology researcher in laboratory demonstrating antler use as tool in prehistory. — Stock Photo
    Archaeology researcher in laboratory demonstrating antler use as tool in prehistory.
    Close-up of two-colored medicine capsule in tweezers above petri dish, pharmaceutical research. — Stock Photo
    Close-up of two-colored medicine capsule in tweezers above petri dish, pharmaceutical research.
    Hands of archaeologist measuring ancient hook with straightedge in archeology lab. — Stock Photo
    Hands of archaeologist measuring ancient hook with straightedge in archeology lab.
    Female archaeology researcher documenting lithics with camera in laboratory. — Stock Photo
    Female archaeology researcher documenting lithics with camera in laboratory.
    Portrait of young female archaeologist using microscope in laboratory. — Stock Photo
    Portrait of young female archaeologist using microscope in laboratory.
    Archaeologists measuring ancient artifacts on digital scale in laboratory. — Stock Photo
    Archaeologists measuring ancient artifacts on digital scale in laboratory.
    Portrait of young archaeologist analyzing charred wood in petri dish. — Stock Photo
    Portrait of young archaeologist analyzing charred wood in petri dish.
    Archaeology researcher in laboratory reconstructing ancient tool. — Stock Photo
    Archaeology researcher in laboratory reconstructing ancient tool.
    Ampules, centrifuge tube and laboratory glassware, pharmaceutical research concept. — Stock Photo
    Ampules, centrifuge tube and laboratory glassware, pharmaceutical research concept.
    Archaeology researcher in laboratory reconstructing ancient tool. — Stock Photo
    Archaeology researcher in laboratory reconstructing ancient tool.
    Microbiology technician working with bacteria strains in petri dish. — Stock Photo
    Microbiology technician working with bacteria strains in petri dish.
    Young archaeologists comparing pottery colors with color chart scheme in laboratory. — Stock Photo
    Young archaeologists comparing pottery colors with color chart scheme in laboratory.
    Hands of archaeologist comparing pottery colors with color chart scheme in laboratory. — Stock Photo
    Hands of archaeologist comparing pottery colors with color chart scheme in laboratory.
    Microbiologist working with petri dishes and test tubes in laboratory. — Stock Photo
    Microbiologist working with petri dishes and test tubes in laboratory.
    Student in wheelchair studying natural gas injector system on furnace in HVAC classroom — Stock Photo
    Student in wheelchair studying natural gas injector system on furnace in HVAC classroom
    Pharmaceutical variety of medicine capsules in petri dishes. — Stock Photo
    Pharmaceutical variety of medicine capsules in petri dishes.
    Young archaeology researchers documenting lithics with camera in laboratory. — Stock Photo
    Young archaeology researchers documenting lithics with camera in laboratory.
    Female scientist holding micro tube with sample in ancient DNA laboratory. — Stock Photo
    Female scientist holding micro tube with sample in ancient DNA laboratory.
    Green plants in test tubes, botanical research concept. — Stock Photo
    Green plants in test tubes, botanical research concept.
    Bioarchaeologists analyzing human osteological material in laboratory. — Stock Photo
    Bioarchaeologists analyzing human osteological material in laboratory.