Saayinsii lafaa
Barreeffama kana akka barreeffama walaloo waa'ee Lafaa irratti barreeffameettin ilaala.
— (1962)
Lafti hanga yoomitti magariisa ta'ee turuu danda'a? Climate model ranges kenna, doomsday date miti
Three-dimensional climate simulations 29 Earth photosynthetic biosphere'f different limits roughly 1.35 fi 1.87 billion years from now gidduu kaa'u. Values deliberately simplified paths rock weathering, heat fi lowest carbon-dioxide levels plants use gochuu danda'an irratti depend godhu. All plants, all life, civilization ykn planet yoom end godhu hin predict godhan.
Crust jalqabaa thin, half-molten: model Hadean keessatti impacts, internal heat miti, ol-aantummaa qaban
Hadean rock record almost hin dhiifne. Modelling study kun impacts ignore gochuu dhiisanii crust akkam ta'uu akka qabu gaafata. Stochastic declining impact-flux model fi benchmarked crust/mantle heat-flow simulations fayyadamuun, impact heat Hadean yeroo baay'ee Earth internal heat hunda at least order of magnitude caalaa ta'uu, crust <~5 km thin fi few km down partially molten ta'uu argan — plate tectonics'f weak, mantletti recycle ta'uu danda'u, Hadean material maaliif dhabame explain. Impacts ~3.9 Ga booda waned yeroo lasting continental crust oldest felsic rocks waliin mul'achuu danda'e — authors careful language keessatti 'likely not a coincidence.' Lower-bound heating purposely fayyadamame, kanaaf qualitative result robust, exact numbers fixed miti. Strong coherent model dha, direct observation miti.