Keywords
beard, caucasian ethnicity, color, colour, culture, development, elderly man, front view, grey hair, happy, head and shoulder, horizontal, indoor, lab coat, lifestyle, looking at camera, male, man, one person, panel, portrait, r & d, r & d matters, r&d matters, research, researcher, science, scientist, smiling, technician, technology, toothy smile, 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, u17392464