People visit the Micropia Museum, which is a museum of micro-organisms, the invisible and most powerful life forms on the earth, in Amsterdam, the Netherlands, on Sept. 30, 2014.(Xinhua/Sylvia Lederer)

People visit the Micropia Museum, which is a museum of micro-organisms, the invisible and most powerful life forms on the earth, in Amsterdam, the Netherlands, on Sept. 30, 2014.(Xinhua/Sylvia Lederer)

Dutch Queen Maxima (R) attends the opening ceremony of the Micropia Museum, which is a museum of micro-organisms, the invisible and most powerful life forms on the earth, in Amsterdam, the Netherlands, on Sept. 30, 2014.(Xinhua/Sylvia Lederer)

Dutch Queen Maxima (R) attends the opening ceremony of the Micropia Museum, which is a museum of micro-organisms, the invisible and most powerful life forms on the earth, in Amsterdam, the Netherlands, on Sept. 30, 2014.(Xinhua/Sylvia Lederer)

People visit the Micropia Museum, which is a museum of micro-organisms, the invisible and most powerful life forms on the earth, in Amsterdam, the Netherlands, on Sept. 30, 2014.(Xinhua/Sylvia Lederer)