Keywords
40s, 45-50 years, 50-55 years, 50s, asian ethnicity, biology, black hair, book, chemist, color image, differential focus, expertise, front view, glasses, head and shoulders, hi-tech, hi-technology, in focus, indoors, japanese ethnicity, lab coat, laboratory, laboratory equipment, large group of objects, looking at camera, male, man, mature adult, mature men, one adult only, one person, out focus, pen, photography, portrait, research, scientist, shelf, sitting, smiling, technology, vertical, stock image, images, royalty free photo, stock photos, stock photograph, stock photographs, picture, pictures, graphic, graphics, fine art prints, print, poster, posters, mural, wall murals, u15157422