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Circle boundary drawn around a group of miniature people with a compass; representing herd immunity
Contemporary art collage. Conceptual design. Young girl with mental health problems feeling depression, fears and sadness. Concept of psychology, inner world, mental health, comfort zone
A man in a female team. Separation by gender. Difficulty of integration into a staff dominated by women. Gender policy. Safety and rules of conduct, boundaries of decency in the workplace.
Detail of the Cretaceous-Paleogene (K-T) boundary in Zumaia (Spain). The boundary zone is about 5 cm thick and contains nickel-rich spinels, microcrystals, soot and a significant iridium anomaly.
a boundary marker made of concrete, placed in the forest

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