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{{Short description|Long-term extrapolated geological and biological changes of planet Earth}} ...of an orange circular object representing the Sun|Conjectured illustration of the scorched [[Earth]] after the [[Sun]] has entered the [[red giant]] phas ...

...t lead to variation between them can be applied to address a diverse array of questions ranging from [[ecology]] and [[hydrology]] to [[geochemistry]] an == History of hydrogen isotopes == ...