"Experts recommend all-female crew for future space missions based on efficiency and practicality"
A study by the European Space Agency found that female astronauts are more efficient than their male counterparts in terms of water requirements for hydration, total energy expenditure, oxygen consumption, carbon dioxide and metabolic heat production during space exploration missions. The study suggests that all-female crews may be more efficient for future space missions, especially in smaller diameter habitat space, and could save millions of dollars in food weight and free up space.