 
 <prompt> Na which edition Darwin address Mivart's objections? Given di previous question, write one context wey contain di answer. E fit be 1 - 20 sentences. Context: <response>: ```Dey bin get serious scientific objections to di process of natural selection as di main mechanism of evolution, including Karl von Nägeli's insistence say trivial characteristic wey no get adaptive advantage fit no dey develop by selection. Darwin gree say dem fit dey linked to adaptive characteristics. Im estimate say di age of di Earth allow gradual evolution bin dey argue by William Thomson (wey later get di title Lord Kelvin), wey calculate say e don cool for less dan 100 million years. Darwin gree for blending inheritance, but Fleeming Jenkin calculate say as e mix traits, natural selection no fit gather useful traits. Darwin try meet dis objections for di 5th edition. Mivart support directed evolution, and gather scientific and religious objections to natural selection. For response, Darwin make plenty changes for di sixth edition. Di problems of di age of di Earth and heredity only solve for di 20th century.``` 