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b'Evrimsel Mekanizmalar: Do\\u011fal Se\\xe7ilim, Yapay Se\\xe7ilim ve E\\u015feysel Se\\xe7ilim nedir, nas\\u0131l i\\u015fler?\\n\\nVaryasyon ve yapay se\\xe7ilimin h\\xfcnerli ellerinin ne kadar ola\\u011fan\\xfcst\\xfc sonu\\xe7lar do\\u011furabildi\\u011fini Darwin iyi biliyordu. Bu sayede horoza veya tavusku\\u015funa benzeyen g\\xfcvercin t\\xfcrleri yarat\\u0131labiliyordu. K\\xf6pekler k\\u0131sa veya uzun t\\xfcyl\\xfc, benekli, alacal\\u0131, \\xe7arp\\u0131k bacakl\\u0131 veya sava\\u015f\\xe7\\u0131 yap\\u0131labiliyordu. Fakat sonu\\xe7ta k\\xf6pekleri ve g\\xfcvercinleri se\\xe7ip \\u015fekillendiren g\\xfc\\xe7, insan eliydi. Peki hangi el, o volkanik adalardaki ispinoz t\\xfcrlerinin birbirinden bu kadar farkl\\u0131 olmas\\u0131na rehberlik etmi\\u015fti? Hangi el, G\\xfcney Amerika d\\xfczl\\xfcklerindeki dev armadillolardan bug\\xfcnk\\xfc k\\xfc\\xe7\\xfck armadillolar\\u0131 ortaya \\xe7\\u0131karm\\u0131\\u015ft\\u0131?\\n\\nDarwin, do\\u011fada t\\xfcrleri ortaya \\xe7\\u0131karan bu eli Tanr\\u0131\\u2019n\\u0131n g\\xf6r\\xfcnmez eline atfedip i\\u015fin i\\xe7inden \\xe7\\u0131kabilirdi.* Fakat 1838 Ekim\\u2019inde, n\\xfcfuslar\\u0131n de\\u011fi\\u015fimlerini inceleyen Thomas Malthus\\u2019un \\u201cN\\xfcfus \\u0130lkesi \\xdczerine Bir Deneme\\u201d ba\\u015fl\\u0131kl\\u0131 \\xe7al\\u0131\\u015fmas\\u0131n\\u0131 okuyunca kuram\\u0131n\\u0131n omurgas\\u0131n\\u0131 oturtmu\\u015ftu. En iyi uyum sa\\u011flam\\u0131\\u015f olan varyant \\u201cdo\\u011fa taraf\\u0131ndan se\\xe7iliyordu\\u201d. Bu, do\\u011fal se\\xe7ilimdi. Do\\u011fal se\\xe7ilim, ger\\xe7ekten devrim niteli\\u011finde bir kavramd\\u0131.\\n\\nBu yay\\u0131n\\u0131m\\u0131zda evrimsel de\\u011fi\\u015fimleri ve adaptasyonu a\\xe7\\u0131klayan se\\xe7ilim tiplerinden; Do\\u011fal Se\\xe7ilim, Yapay Se\\xe7ilim, E\\u015feysel Se\\xe7ilim ve di\\u011fer se\\xe7ilim tiplerinin neler oldu\\u011fu ve nas\\u0131l i\\u015fledi\\u011fi \\xfczerine konu\\u015ftuk.\\n\\n* Gen-Siddhartha Mukherjee (Domingo Yay\\u0131nevi)'