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Hourglass with flowing sand, pocket watch, and alarm clock symbolize time passing by
Science and research of the universe, spiral galaxy and physical formulas, concept of knowledge and education. Elements of this image furnished by NASA.
Spark discharges for physics studies and student projects.
In school gym, diverse children cheering and raising hands, enjoying physical education class. Sports, teamwork, exercise, kids, enthusiasm, healthy
Physical therapist doing rehab physical therapy or massage on leg and knee to senior man at Physiotherapy clinic. Orthopedic doctor examining elderly patient at hospital. Elderly medical healthcare.

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