Is urbanization pushing Earth's evolution to a tipping point?
Seattle WA (SPX) Feb 20, 2015 - That humans and the cities we build affect the ecosystem and even drive some evolutionary change in species' traits is already known. The signs are small but striking: Spiders in cities are getting bigger and salmon in rivers smaller; birds in urban areas are growing tamer and bolder, outcompeting their country cousins. What's new is that these evolutionary changes are happening much more ... more
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