Quiz: Do you know these great women of science? For International Women's Day, test your knowledge of great scientists past and present ¿ìè¶ÌÊÓÆµ
PhysicsThe emptiness of space has a structure we could use to send messages We could send messages by vibrating the structure of the vacuum of empty space - but they could only be read by a powerful laser that rips the vacuum apart ¿ìè¶ÌÊÓÆµ