title: How climate evolved on the terrestrial planets.
abstract: Planets with temperate, earthlike climates were once thought to be rare in our galaxy.  Mathematical models now suggest that if planets do exist outside the solar system, many of them might be habitable.
authors.forename: J F
authors.initials: JF
authors.lastname: Kasting
authors.forename: O B
authors.initials: OB
authors.lastname: Toon
authors.forename: J B
authors.initials: JB
authors.lastname: Pollack
mesh_terms: D055580:Astronomical Phenomena; D001256:Astronomy; D001272:Atmosphere; D002245:Carbon Dioxide / Q000737:chemistry*; D002254:Carbonates / Q000737:chemistry; D002980:Climate; D018534:Earth, Planet; D005118:Extraterrestrial Environment; D017752:Greenhouse Effect; D018535:Mars; D008962:Models, Theoretical; D017640:Silicates / Q000737:chemistry; D016082:Solar System; D013696:Temperature; D018536:Venus; D014867:Water / Q000737:chemistry*
chemical_list: D002254:Carbonates; D017640:Silicates; D014867:Water; D002245:Carbon Dioxide