Donald Yeomans, director of the Office of nearby objects to Earth from nasa, a meteorite impact: in very large time scales, the risk of dying as a result of the impact of a near-Earth object is roughly equivalent to the risk of dying in a plane crash. To cause a big problem to our civilization, the impact would be around 1. 5 km in width or more, expect an event like that every million years approximately. Hans Moravec, researcher of the Institute of Robotics from Carnegie Mellon University in Pittsburgh, Robots take command: robotic controllers dual its complexity every year or every two years. They are currently just below the lower range of vertebrate complexity, but they should reach us at mid-century. By 2050, I foresee that there will be robots with a mental power as humans with capacity of abstraction and generalization. NIR Shaviv, Professor of physics at the University of Jerusalem, bombardment of cosmic rays by the outbreak of a star: every few decades, a giant star of our Galaxy, runs out of fuel and explodes. It is what is called a Supernova.
Cosmic rays they extend in all directions. If it turns out that the Earth is in the Middle can cause a new ice age. If the Earth already has a cold climate, a bonus download of cosmic rays could do that things helasen of truth and cause the extinction of a number of species. Bill McGuire, director of the Benfield Hazard at the University College of London, Supervolcanos: approximately every 50 000 years the Earth undergoes a supervolcano. More than 1000 square kim of Earth can be undone in a flow of ash clastic piro, all around can meet ash and sulfuric gases will inject into the atmosphere, creating a thin veil of sulphuric acid around the planet that would not pass in the sunlight for years.