July 25

1976 – NASA's Viking 1 takes the famous "Face on Mars" photograph, in which rock formations and shadows give the illusion of a "face" looking up at the camera.
1978 – Louise Joy Brown is born. She was the first human to have been born after conception by "in vitro fertilization," or "IVF".
1984 – Astronaut Svetlana Savitskaya becomes the first woman to perform a space walk.