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Sacramento, California, USA - March 19, 2011: 1956 Israel postage stamp with a portrait of Albert Einstein to the right of his E=mc2 equation.
Senior male supervisor doing experiments and researchers working in the laboratory.
Mastermind in a lab coat devises forbidden substances in a black and white early 20th-century setting, hinting at concealed alliances with or deception of governments
Portrait of crazy scientist trying to repair computer chip and looking at camera.
Science and black holes.Basic properties of black holes. A scientist writes physical and mathematical formulas on a blackboard with white chalk.Schwarzschild radius
A teacher with a long white beard, big gray hair, and glasses is wearing a checkered shirt and sports jacket in front of a blackboard with complex formulas written on it. He has his arms around his textbooks and looks at the camera with a big smile.
Crazy science teacher in white coat with unkempt hair in funny eye glasses holding a wand to point at the blackboard
Mad woman scientist holding a test tube.  You might also be interested in these:
Old man scientist working with chemical in research laboratory, blue background
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mad professor, the classic movie villain, theatrically creates viruses in a lab. Believing humanity inferior, he sadistically uses them as tools. Tied to a global conspiracy, he aims to dominate BIG P
blackboard in the classroom isolated on white background
A teacher with a long white beard, big gray hair, and glasses is wearing a checkered shirt and sports jacket in front of a blackboard with complex formulas written on it. He has his arms around his textbooks and is looking at the camera.
Crazy science teacher in white coat with unkempt hair in funny eye glasses sitting at the desk  holding a wand to point at the blackboard
Sacramento, California, USA - December 11, 2008: A 1979 India postage stamp issued to commemorate the 100th anniversary of Albert Einstein's birth in 1879. Einstein (1879-1955) is world renown and his name has become synonymous with intelligence or genius.
Senior male supervisor doing experiments and researchers working in the laboratory.
Studio shot of senior man doctor with long blond hair wearing protective eyeglasses against gray background
Scientist wearing black gloves and a lab coat holds up a test tube filled with a clear liquid, radiating excitement about a groundbreaking discovery in the laboratory
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Golden 3D physics icon isolated on white background - 3D render
A teacher with a long white beard, big gray hair, and glasses is wearing a checkered shirt and sports jacket in front of a blackboard with complex formulas written on it. He looks sternly at the camera over his glasses with his index finger raised.
Blond boy bulged his eyes in surprise and raised glasses, conducting experiments in laboratory. Young researcher made incredible discovery, looking molecules in microscope, was surprised and delighted
Mad scientist playing with syringe http://www.lisegagne.com/images/conceptual.jpg
Portrait of a crazy scientist doing experiment. He wears lab coat and bow tie, holds test tubes and makes a face.
Nerd crazy scientist man portrait working at laboratory with gray hair
formula E = mc2 on blackboard
Richmond , Virginia, USA - July 22, 2013: Cancelled Stamp From San Marino Featuring The American Scientist, Albert Einstein. Albert Einstein Lived From 1879 Until 1955.
London, UK – January 29, 2012: USA postage stamp of 1979 commemorating the 100th anniversary of the birth of  Albert Einstein
A teacher with a long white beard, big gray hair, and glasses is wearing a checkered shirt and sports jacket in front of a blackboard with complex formulas written on it. He has his back to the camera with his hand behind his neck.
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