Education, Science Class, Two students in uniform at desk examining contents of test tube with open exercise books, pens and pencils in front of them.

Education, Science Class, Two school girls in uniform at desk examining contents of test tube with open exercise books, pens and pencils in front of them.

Measuring cylinder container. Graduated beaker. Gray

The army burning and destroying a jungle cocaine laboratory in the war against illegal drugsAmerican Colombian Columbia Hispanic Latin America Latino South America

The army burning and destroying a jungle cocaine laboratory in the war against illegal drugsAmerican Colombian Columbia Hispanic Latin America Latino South America

Man working in medical laboratory.

Petri dishes