Skype-grundaren: En på sex vi inte överlever århundradet

Jaan Tallinn (born 14 February 1972) is an Estonian computer programmer and investor known for his participation in the development of Skype in 2002 and FastTrack/Kazaa, a file-sharing application, in 2000.Jaan Tallinn is partner and co-founder of the development company Bluemoon which created the game SkyRoads.

A runaway greenhouse effect occurs when a planet's atmosphere contains greenhouse gas in an amount sufficient to block thermal radiation from the planet, preventing the planet from cooling and from having liquid water on its surface. A runaway version of the greenhouse effect can be defined by a limit on a planet's outgoing longwave radiation which is asymptotically reached due to higher surface temperatures boiling a condensable species (often water vapor) into the atmosphere, increasing its optical depth. This positive feedback means the planet cannot cool down through longwave radiation (via the Stefan–Boltzmann law) and continues to heat up until it can radiate outside of the absorption bands of the condensable species. The runaway greenhouse effect is often formulated with water vapor as the condensable species. In this case the water vapor reaches the stratosphere and escapes into space via hydrodynamic escape, resulting in a desiccated planet. This may have happened in the early history of Venus.