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Professor with arms crossed in front of blackboard
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Professor with arms crossed in front of blackboard

Serious scientist in glasses is standing indoors with arms crossed near chalkboard with formulas looking at camera. Occupation, science and confident people concept.

Calendar outlinedPublished on September 24, 2025 (UTC)SafetyFree to use under the Unsplash License
portraitschooleducationclassroomstudyuniversityscienceteachercollegeglassesphysicsknowledgescientistblackboardclassolder manmathematicsacademicprofessormentorshipPublic domain images

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