Whoa! Whoa! dhw take notice!!! (The limitations of science)

by David Turell , Sunday, April 20, 2014, 19:54 (3868 days ago) @ romansh

Romansh: I simply cannot see how an asteroid crashing into the earth can be called Natural Selection. 
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> For me natural selection and the environment are inseparable. 
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> Asteroids are major step changes in the environment, 
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> and evolution could be considered an incremental change, ie the flora and fauna within an ecosystem change slowly. A biological entity shapes its environment (not intentionally)and that environment in turn shapes the entity's evolution.-The problem is interpreting and defining where in a time sequence does natural selection take place. I agree that an asteroid is part of a process of various changes that can end up challenging survival. As I see it, there must be changes in competition and in environment, then adaptations, and then finally as a result of competition, survival of some phenotypes. I view natural selection only as the competition/survival part of the process.