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

White rat in cage, laboratory workers peering into cage

Laboratory worker lifting white rat from cage

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

Laboratory worker holding white rat

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

Laboratory worker holding white rat, smiling

Laboratory worker holding white rat, smiling

Laboratory worker reaching into cage containing white rat

Laboratory worker looking into cage containing white rat

Laboratory worker feeding white rat in cage

White rat in cage, laboratory worker in background

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

Laboratory worker examining white rat

Laboratory workers looking at molecular model

Two laboratory workers looking at computer screen

Portrait of four laboratory workers in lab

Laboratory worker injecting white rat using syringe

Laboratory worker choosing measuring tube

Laboratory worker using digital tablet

Laboratory worker writing details on test tube

Lunar material testing, 1969

Laboratory workers looking at computer screen

Laboratory worker doing experiment in lab, close-up

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

Laboratory worker examining contents of petri dish

Lunar animal research

Animal testing

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

Laboratory worker holding glass beaker, containing yellow liquid

Rat metabolism research

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

Laboratory worker using digital tablet, mid section

Laboratory worker using digital tablet, mid section

Laboratory worker holding liquid filled test tube, using digital tablet

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

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

Laboratory worker holding liquid filled test tube

Laboratory worker examining liquid filled test tube, close-up

Lab tech holding rat from vat

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

Scientists working in laboratory, sample in glass bottle

Laboratory worker looking at laboratory equipment

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

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

Laboratory worker doing experiment in lab

Laboratory worker writing details on test tube

Laboratory worker writing details on test tube

Laboratory worker examining contents of petri dish

Laboratory worker choosing pipette, close-up

Laboratory worker writing details on test tube, rear view

Portrait of female laboratory worker, arms folded, smiling

Laboratory worker examining two petri dishes side by side

Laboratory worker holding test tube rack, close-up

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

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

Bacteriology research, 1910s

Laboratory worker using pipette to take liquid from test tube

Severe Combined Immunodeficiency mouse

Gene therapy research on mice

Gene therapy research on mice

Gene therapy research on mice

Portrait of confident scientist using microscope in laboratory

Scientist experimenting with a chemical formula in the laboratory

Scientist experimenting with a chemical formula in the laboratory

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

Scientists in laboratory using computer

Scientists in laboratory using computer

Scientists in laboratory using computer

Scientists in laboratory using scientific equipment

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

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

US psychologists with laboratory rat and pet cat

White laboratory rat

Female scientist holding paperwork in laser laboratory

Scientist preparing chemical experiment in laboratory

Scientists holding solar panel in rural landscape

Scientist preparing DNA samples for testing in the laboratory

Laboratory worker using pipette, dripping liquid into petri dish

Portrait of lab technician in biofuel plant laboratory

Scientist viewing a DNA gel during an experiment in the laboratory

Scrub typhus research, 1940s

Laboratory worker holding test tube rack

Scientist in laboratory doing experiment

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

Scientist in laboratory using scientific equipment

Scientist in laboratory using scientific equipment

Scientists in laboratory writing in notebook

Scientist in laboratory looking through microscope

Scientist in laboratory looking through microscope

Scientists working in laboratory

Scientists working in laboratory

Portrait of scientist in laboratory looking at camera

Portrait of scientist in laboratory looking at camera smiling

Male scientist in laboratory

Scientist using laboratory equipment

Scientist carrying tray of test tubes in laboratory

Scientist using a microscope in a laboratory

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

Laboratory worker taking test tube from rack

Konrad Gessner, Swiss naturalist

Scientist using microscope in laboratory

Scientist in holographic laboratory

Scientist in holographic 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

Animal testing

Germany, Bavaria, Munich, Deutsches Museum, Exhibit of Animal Testing

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

Female scientist holding container in laser laboratory

Scientists working in laboratory

Scientists working in laboratory

Scientists working in laboratory

White rats in the box

Scientists talking in laboratory

Experiments on mice, USA, 1944

Anna Chao Pai, Chinese-American geneticist

Lab assistant checking details on digital tablet

Scientists reading test results in laboratory

White laboratory rat

Scientist Auguste Forel

Scientist viewing a DNA profile experiment in a laboratory

Scientists in clean suits walking in hallway

Magnetic north pole research

Magnetic north pole research

Magnetic north pole research

Portrait of confident scientist holding tube with green liquid

Scientists examining sample inside petri dish in laboratory

Brown rats feeding at bird feeder

Female scientist examining cell cultures growing in a culture jar by using a inverted microscope in the laboratory

Female scientist examining cell cultures growing in a culture jar by using a inverted microscope in the laboratory

Scientists working in laboratory

Biotechnology research, scientist pipetting sample into vial for analysis in laboratory, close up of hands

ネズミ

ネズミ

ハツカネズミ

Technician holding white rat, Close Up

Technician holding white rat, Close Up

Technician holding white rat, Close Up

Close up of scientist using microscope in laboratory

Mosquito genetics research

Scientists in discussion

Scientists in laboratory using computer

Scientist in laboratory using computer

Scientist in laboratory using computer

テンジクネズミ

Hairless mouse - Mus musculus

Hairless mouse - Mus musculus

Scientist carrying tray of test tubes in laboratory