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This is a useful timeline, but it appears to be not a timeline of the universe, as the title and parts of the introduction would indicate, but rather a timeline of conditions of habitability of the solar system. Wikipedia has longer scale timelines apropos the universe, e.g., those linked from Chronology of the universe, including Graphical timeline from Big Bang to Heat Death. --Figsyrup (talk) 02:34, 9 March 2013 (UTC)
Why is 'Earth's surface too hot for life' so long before 'evaporation of earth's oceans'? We know hyperthermophilic life can exist even above the boiling point, so it seems life would not end from heat alone, but from lack of water after the oceans were gone. Vultur (talk) 09:46, 4 May 2009 (UTC)