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Laboratory worker lifting white rat from cage

Laboratory worker holding white rat

Laboratory worker injecting white rat, using syringe

Laboratory worker injecting white rat, using syringe, close-up

Laboratory worker injecting white rat, using syringe, close-up

White rat in cage, laboratory workers peering into cage

Laboratory worker holding white rat, smiling

Laboratory worker holding white rat, smiling

Laboratory worker feeding white rat in cage

Laboratory workers looking into cage containing white rats, low angle view

White rat in cage, laboratory worker in background

Laboratory worker examining white rat

Laboratory worker reaching into cage containing white rat

Laboratory worker looking into cage containing white rat

Laboratory worker holding digital tablet, looking into cage containing white rat

Laboratory worker, holding digital tablet, looking into cage containing white rats

Laboratory worker injecting white rat using syringe

Laboratory worker choosing measuring tube

Laboratory worker using digital tablet

Laboratory worker writing details on test tube

Laboratory worker examining contents of petri dish

Laboratory worker doing experiment in lab, close-up

Laboratory worker holding liquid filled test tube

Laboratory worker examining liquid filled test tube, close-up

Laboratory worker using pipette, dripping liquid into petri dish, close-up

Laboratory worker using pipette, dripping liquid into petri dish, close-up

Laboratory worker using pipette to take liquid from test tube

Lunar material testing, 1969

Laboratory workers looking at molecular model

Two laboratory workers looking at computer screen

Rat metabolism research

Portrait of four laboratory workers in lab

Laboratory worker using pipette, dripping liquid into petri dish

Closeup of female scientist wearing blue gloves holding rat with male colleague while working in a laboratory for experiment

DNA Research, Scientist comparing DNA results on a computer screen in the laboratory

Lunar animal research

Lab tech holding rat from vat

Laboratory worker placing liquid filled test tube in rack. close-up

Laboratory worker placing liquid filled test tube into rack, elevated view

Laboratory worker doing experiment in lab

Laboratory worker writing details on test tube

Laboratory worker writing details on test tube

Laboratory worker choosing pipette, close-up

Laboratory worker writing details on test tube, rear view

Laboratory worker examining two petri dishes side by side

Bacteriology research, 1910s

Laboratory worker taking test tube from rack

Animal testing

Closeup of two female scientist are holding a lab rat for observation and experimentation in laboratory

Closeup of young female scientist hand holding and using syringe on laboratory rat

Laboratory worker using digital tablet, mid section

Laboratory worker using digital tablet, mid section

Laboratory worker holding test tube rack

Laboratory worker holding test tube rack, close-up

US psychologists with laboratory rat and pet cat

Laboratory worker taking liquid from test tube, using pipette, close-up

Laboratory worker holding liquid filled test tube, using digital tablet

Laboratory worker examining liquid in test tube

White laboratory rat

Laboratory worker holding liquid filled test tube, close-up

Laboratory worker holding liquid filled test tube, close-up

Laboratory worker holding liquid filled test tube, close-up

Scientist preparing DNA samples for testing in the laboratory

Laboratory worker examining contents of petri dish

Portrait of female laboratory worker, arms folded, smiling

Laboratory worker holding glass beaker, containing yellow liquid

Technician holding white rat, Close Up

Technician holding white rat, Close Up

Technician holding white rat, Close Up

Scientist using laboratory equipment

Laboratory workers looking at computer screen

DNA Research, Scientist holding up a DNA sample with results on the computer screen

Lab technician inspecting beaker of yellow biofuel in biofuel plant laboratory

Lab technician inspecting beaker of yellow biofuel in biofuel plant laboratory

Lab technician looking at beaker of yellow biofuel in biofuel plant laboratory

Lab technician looking at beaker of yellow biofuel in biofuel plant laboratory

Lab technician looking at beaker of red biofuel in biofuel plant laboratory

Lab technician looking at beaker of yellow biofuel in biofuel plant laboratory

Lab technician looking at beaker of red biofuel in biofuel plant laboratory

Technician holding white rat, Close Up

Laboratory worker examining test tube

Laboratory worker examining liquid filled test tube

Severe Combined Immunodeficiency mouse

White laboratory rat

Gene therapy research on mice

Gene therapy research on mice

Gene therapy research on mice

Laboratory worker using long pipette, dropping liquid into petri dish

Laboratory worker looking at laboratory equipment

Scientists working in laboratory, sample in glass bottle

Scientists working in laboratory, man looking through microscope and woman taking notes

Scientists working in laboratory, woman with microscope and man taking notes

Scientist viewing a DNA gel during an experiment in the laboratory

Two female researchers holding a lab rat for experimentation

Portrait of confident scientist using microscope in laboratory

Funny scientist with cat skeleton in lab clinic

Funny crazy student doctor studying animal skeleton

Funny scientist with cat skeleton in lab clinic

American biomedical researchers, 1957

Student doctor studying animal skeleton

Funny crazy student doctor studying animal skeleton

Funny crazy student doctor studying animal skeleton

Funny scientist with cat skeleton in lab clinic

Student doctor studying animal skeleton

Funny scientist with cat skeleton in lab clinic

Funny crazy student doctor studying animal skeleton

Funny scientist with cat skeleton in lab clinic

Funny scientist with cat skeleton in lab clinic

Student doctor studying animal skeleton

Funny scientist with cat skeleton in lab clinic

Funny scientist with cat skeleton in lab clinic

Funny crazy student doctor studying animal skeleton

Funny scientist with cat skeleton in lab clinic

Funny scientist with cat skeleton in lab clinic

Funny scientist with cat skeleton in lab clinic

Funny scientist with cat skeleton in lab clinic

Funny scientist with cat skeleton in lab clinic

Funny scientist with cat skeleton in lab clinic

Funny scientist with cat skeleton in lab clinic

Funny scientist with cat skeleton in lab clinic

Funny scientist with cat skeleton in lab clinic

Student doctor studying animal skeleton

Funny scientist with cat skeleton in lab clinic

Funny scientist with cat skeleton in lab clinic

Funny scientist with cat skeleton in lab clinic

Funny scientist with cat skeleton in lab clinic

Student doctor studying animal skeleton

Funny scientist with cat skeleton in lab clinic

Funny scientist with cat skeleton in lab clinic

Funny scientist with cat skeleton in lab clinic

Student doctor studying animal skeleton

Funny scientist with cat skeleton in lab clinic

Student doctor studying animal skeleton

Student doctor studying animal skeleton

Funny crazy professor studying animal skeletons

Funny crazy professor studying animal skeletons

The funny crazy professor studying animal skeletons. Funny crazy professor studying animal skeletons

Funny crazy professor studying animal skeletons

Funny crazy professor studying animal skeletons

The funny crazy professor studying animal skeletons. Funny crazy professor studying animal skeletons

Funny crazy professor studying animal skeletons

Funny crazy professor studying animal skeletons

Portrait of lab technician in biofuel plant laboratory

Male scientist in laboratory

Rat cage

DNA Research, Scientist holding up a multi well plate containing DNA samples with results on the computer screen

DNA Research, Scientist holding up a tray of DNA samples with results on the computer screen

Oriental rat flea, SEM

Scientist examining data on a laptop computer from an experiment in the laboratory

Researcher holding a DNA (deoxyribonucleic acid) gel during a genetic experiment in a laboratory

Scientist examining data on a laptop computer from an experiment in the laboratory

Biotechnology Research, scientist viewing samples in a multi well plate during an experiment in the laboratory

Biotechnology Research, scientist viewing samples in a multi well plate during an experiment in the laboratory

Scientist preparing blood samples in a multi well plate for clinical testing in a laboratory

Scientist preparing blood samples in a multi well plate for clinical testing in a laboratory

Scientists working in laboratory

Female scientist holding container in laser laboratory

A rat

Portrait of scientist in laboratory

A rat

Scientists working in laboratory

Scientists working in laboratory

Scientists working in laboratory

Chemist holding test tube in laboratory

DNA Research, Scientist viewing DNA test results on a computer screen in the laboratory with a tray of samples in the fore ground

Lab assistant working on microscope

Lab assistant looking into microscope

Lab assistant checking details on clipboard

Lab assistant fixing part

Lab assistant working on equipment

Lab assistant checking details on digital tablet

Lab assistant working on microscope

Lab assistant checking details on clipboard

Lab assistant working on equipment

Microscopy lab assistant working on equipment

Lab assistant working with scanning electron microscope

Lab assistant working on equipment

Lab assistant working on equipment

Lab assistant working on equipment

Lab assistant using smartphone

Lab assistant checking details on digital tablet

Lab assistant working with SEM image on computer

Portrait of lab technician holding empty glass jar

Experiments on mice, USA, 1944

Pharmaceutical Research, Scientist holding a multi well plate containing drugs to be tested in the laboratory

Pharmaceutical Research, Scientist holding a multi well plate containing drugs to be tested in the laboratory

Biotechnology Research, Scientist viewing specimens in a multi well plate during an experiment in the laboratory

Biotechnology Research, Scientist viewing specimens in a multi well plate during an experiment in the laboratory

Biotechnology Research, Scientist viewing specimens in a vial during an experiment in the laboratory

Medical technician holding protective glasses with human samples on the laboratory bench

Scientist reading sample information on a blood sample ready to view under a microscope in laboratory for medical testing

Scientists in clean suits walking in hallway

Scientists reading test results in laboratory

Scientist preparing a chemical formula in a conical flask during an experiment in the laboratory

Scientist preparing a chemical formula in a conical flask during an experiment in the laboratory

Laboratory worker using long pipette to transfer liquid to petri dish

Laboratory worker using long pipette to transfer liquid to petri dish

Scientists examining sample inside petri dish in laboratory

Cropped view of scientist in laboratory putting on latex gloves

Albino laboratory rat