Changes

@Karajou: What about all of the fossils which are shown to be a certain age by radioactive dating of the surrounding rocks? Evolution by natural seletion usually takes too long to be seen within a few human generations, so biologists have to rely on fossil records etc. but there are a few instances where it can and hass been observed. Often, this is due to a species being isolated on an island and differentiating significantly from the mainland type within a human lifetime. Artificial selection is a similar mechanism to natural selection, but happens on much shorter timescales. That is why cows produce so much milk, and horses can pull heavy carts, and how sheep produce fine wool. Farmers choose the characteristics that give optimal products and breed them; over time, the species changes to become better at what it is being bred for. Natural selection follows the same principle, except the purpose is survival and the watchmaker is blind.

@Karajou: What about all of the fossils which are shown to be a certain age by radioactive dating of the surrounding rocks? Evolution by natural seletion usually takes too long to be seen within a few human generations, so biologists have to rely on fossil records etc. but there are a few instances where it can and hass been observed. Often, this is due to a species being isolated on an island and differentiating significantly from the mainland type within a human lifetime. Artificial selection is a similar mechanism to natural selection, but happens on much shorter timescales. That is why cows produce so much milk, and horses can pull heavy carts, and how sheep produce fine wool. Farmers choose the characteristics that give optimal products and breed them; over time, the species changes to become better at what it is being bred for. Natural selection follows the same principle, except the purpose is survival and the watchmaker is blind.

Here is a very interesting video which shows unconscious artificial selection in action; it has given very interesting results; a human face on a crab shell!:

Here is a very interesting video which shows unconscious artificial selection in action; it has given very interesting results; a human face on a crab shell!:

[http://www.youtube.com/watch?v=dIeYPHCJ1B8 Here]

[http://www.youtube.com/watch?v=dIeYPHCJ1B8 Here] --[[User:Samsonnn|Samsonnn]] 09:08, 13 November 2011 (EST)