The International Day of Women and Girls in Science  is celebrated on February 11 and its goal is to allow us to honor women’s significant achievements in science and place a much-needed focus on girls entering this types of careers. It was founded by the UN General Assembly in 2015. It is celebrated in the United States to encourage gender equality and ensure equal access for woman and girls in science. The main reason for this declaration was to encourage more girls and women to take up jobs in the fields of science, technology, engineering and mathematics (also known as the STEM subjects). Figures show that although there is no significant difference in ability between boys and girls in mathematics and science, less than 35 per cent of graduates in STEM subjects worldwide are women and there are even fewer in engineering and information technology. We all know that science and gender equality are important factors that allow us to achieve goals internationally but the problem is that, as I mentioned, it is mainly celebrated in the United States. In Greece on February 11 we only celebrate some names from the Orthodox calendar but I think that we should celebrate it as an international Day of Women and Girls in Science too. You would probably wonder why it is important to involve more women and girls in science. Well, when one group of people dominates a field of study, whether it’s a specific age or gender group, there is danger of creating a narrow view of the subject. Including more women in »male-dominated» areas will bring in fresh points of view, talent and creativity. It can also help increase women’s social and  position in some countries where patriarchy still exists. This year,  the 10th Anniversary of The FEBRUARY11 Global Movement is celebrated. Taking this opportunity, I will mention some of the most important female scientists in the 20th century: n the field of biology and Chemistry Johanna Dobereiner (born 1924), a Brazilian pioneer in soil biology and Pauline Ramart (1880–1953), a French chemist and politician.