Computer simulations by Mike Rampino, a climate modeler from New York University, show that the resulting ash cloud could have plunged the area into darkness.
The resulting adaptations to dry land include some structural features that arose early in plant evolution; now these features are common to virtually all land plant.
Exposures to odors in natural environments often occur over far longer periods, and the resulting adaptations may differ qualitatively from short-term olfactory adaptation.
Since they haven't built up their credit histories yet, it's a safe bet that these young adults are paying relatively high interest rates on the resulting credit card debt.
The resulting settlement maps show how the distribution and density of the rural population around the city changed dramatically between AD 500 and 850, when copán collapsed.
She decided that she was going to try to just use cash for two weeks to make all of her essential purchases and see what that would do to her spending.