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    Close-up of pharmaceutical examining filling of medical pill. — Stock Photo
    Close-up of pharmaceutical examining filling of medical pill.
    Ophthalmologist examining a woman's eyes with a slit lamp — Stock Photo
    Ophthalmologist examining a woman's eyes with a slit lamp
    Engineer in electric power plant reviewing sensor readings with voltmeter probe — Stock Photo
    Engineer in electric power plant reviewing sensor readings with voltmeter probe
    Engineer in electric power plant inspecting condenser room piping — Stock Photo
    Engineer in electric power plant inspecting condenser room piping
    Boy with magnifying glass looking at dandelions — Stock Photo
    Boy with magnifying glass looking at dandelions
    Female power engineer checking transducer at power station — Stock Photo
    Female power engineer checking transducer at power station
    Female power engineer checking valve at power station — Stock Photo
    Female power engineer checking valve at power station
    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
    Female power engineer checking transducer at power station — Stock Photo
    Female power engineer checking transducer at power station
    Archaeologist analyzing ancient artifact in laboratory. — Stock Photo
    Archaeologist analyzing ancient artifact in laboratory.
    Ophthalmologist examining a woman's eyes with an indirect ophthalmoscope — Stock Photo
    Ophthalmologist examining a woman's eyes with an indirect ophthalmoscope
    Female power engineer checking fuel line sensors at power plant — Stock Photo
    Female power engineer checking fuel line sensors at power plant
    Ophthalmologist counseling patient regarding her eye condition — Stock Photo
    Ophthalmologist counseling patient regarding her eye condition
    Cable lineman holding onto pole while using lineman spikes to adjust tension — Stock Photo
    Cable lineman holding onto pole while using lineman spikes to adjust tension
    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.
    Hands of archaeologist analyzing charred wood in petri dish. — Stock Photo
    Hands of archaeologist analyzing charred wood in petri dish.
    Archaeologist measuring ancient loom weights on digital scale in laboratory. — Stock Photo
    Archaeologist measuring ancient loom weights on digital scale in laboratory.
    Communications worker on a power pole attaching clips to support cable — Stock Photo
    Communications worker on a power pole attaching clips to support cable
    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.
    Female power engineer checking fuel line sensors at power plant — Stock Photo
    Female power engineer checking fuel line sensors at power plant
    Boy with magnifying glass looking at dandelions — Stock Photo
    Boy with magnifying glass looking at dandelions
    Archaeology researchers in laboratory reconstructing usage of ancient axe tool. — Stock Photo
    Archaeology researchers in laboratory reconstructing usage of ancient axe tool.
    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.
    Little boy using stethoscope as playing at being doctor in pediatrician office. — Stock Photo
    Little boy using stethoscope as playing at being doctor in pediatrician office.
    Hispanic carpenter with trowel inspecting deck footing — Stock Photo
    Hispanic carpenter with trowel inspecting deck footing
    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.
    Portrait of young female archaeologist using and looking in microscope in laboratory. — Stock Photo
    Portrait of young female archaeologist using and looking in microscope in laboratory.
    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.
    Female power engineer checking fuel line sensors at power plant — Stock Photo
    Female power engineer checking fuel line sensors at power plant
    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.
    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.
    Archaeology researcher in laboratory reconstructing ancient tool. — Stock Photo
    Archaeology researcher in laboratory reconstructing ancient tool.
    Young archaeologists comparing pottery colors with color chart scheme in laboratory. — Stock Photo
    Young archaeologists comparing pottery colors with color chart scheme in laboratory.
    Boy with magnifying glass looking at dandelions — Stock Photo
    Boy with magnifying glass looking at dandelions
    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.
    Project engineer with a Spinal Cord Injury in a wheelchair at job site — Stock Photo
    Project engineer with a Spinal Cord Injury in a wheelchair at job site
    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
    Cable lineman assessing cable distribution wiring on poles in the city — Stock Photo
    Cable lineman assessing cable distribution wiring on poles in the city
    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.
    Bioarchaeologists analyzing human osteological material in laboratory. — Stock Photo
    Bioarchaeologists analyzing human osteological material in laboratory.
    Archaeology researcher performing lithics analysis with magnifying glass and measuring artifacts with straightedge tool. — Stock Photo
    Archaeology researcher performing lithics analysis with magnifying glass and measuring artifacts with straightedge tool.
    Close-up of archaeology researcher documenting lithics with camera in laboratory. — Stock Photo
    Close-up of archaeology researcher documenting lithics with camera in laboratory.