* ''None yet''Mathematician Roger Penrose publishes a paper on gravitational collapse and space-time [[Singularity|singularities]]. * Astronaut Alexei Leonov leaves his spacecraft for 12 minutes, becoming the first person to walk in space. * [[Probe]] "Venera 3" is launched, heading towards [[Venus]]. <br> It becomes the first spacecraft to reach the surface of another planet.