... Lutetia: The Largest Asteroid Yet Visited . ... As humans explore the universe, the record for largest asteroid visited by a spacecraft has increased yet again. ... Happy People Dancing on Planet Earth . ... Dancing. Many humans on Earth exhibit periods of happiness, and one method of displaying happiness is dancing. Happiness and dancing transcend political boundaries and occur in practically every human society. ... Lightning Over Athens . ... The Antennae Galaxies in Collision . ...