Thread: Global Cooling
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Old 09-11-2013, 11:29 AM   #30
spring fever
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Join Date: May 2006
Location: Rochester area
Posts: 2,236
The Paleocene–Eocene Thermal Maximum took 20,000 years to change the climate by 6 degrees. Climate scientists are predicting that level of change in a century or two.

20,000 years is enough time for entire biomes to shift thousands of miles. It's enough time for plant species to spread into new areas and be extirpated from other areas. And even then many species went extinct (although not enough to call it a true mass extinction). It's slow enough for new species to evolve to adapt to new niches.

A few decades, or centuries even, (which is what we're dealing with now) is not nearly enough time for those very slow range shifts and evolutionary adaptations to occur.
He found himself wondering at times, especially in the autumn, about the wild lands, and strange visions of mountains that he had never seen came into his dreams.
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