Description: big-bang model, widely held theory of the evolution of the universe. Its essential feature is the emergence of the universe from a state of extremely high temperature and density—the so-called big bang that occurred 13.8 billion years ago. Although this type of universe was proposed by Russian mathematician Aleksandr Friedmann and Belgian astronomer Georges Lemaître in the 1920s, the modern version was developed by Russian-born American physicist George Gamow and colleagues in the 1940s.
Description: The dream catcher is one of the most enduring and widespread symbols associated with Native American culture. It's commonly believed that the iconic hoop-and-web form is meant to protect sleepers from bad dreams by “catching” them, while letting good dreams pass through, hence the name.
