Viruses regularly evolve new ways of making people sick, but scientists usually do not become aware of these new strategies until years or centuries after they have evolved.
More and more, policymakers are being pushed to base their decisions on evidence that is regularly evolving and, occasionally, changing, especially for complex interventions that cannot be tested everywhere prior to adoption.
In any event, it appears that species evolved regularly throughout the Pleistocene in northern temperate areas as a result of glacial cycles and the habitat changes they caused (Klicka and Zink 1997, 1999).
This analysis suggested that the streptophyte algae regularly (without reversions) evolved towards increasing morphological complexity (resulting in a larger number of shared morphological characters with embryophytes).
We demonstrate that India's city-system conforms to the distributed growth model and that its hierarchical distribution is evolving regularly.
The experimental data reveal that the departing periods of successive bubbles evolve regularly from single period to triple periods within the air flow rate regime of 100 cc/min
Whether resistance is evolving regularly in different genetic backgrounds or in a single clone with a genetic predisposition, as early results suggest, is unclear.
Finally, Sullivan-type health expectancies use the observed prevalence of disability/health to approximate the true period conditions, a reasonable approximation provided that disability or self-rated health is stable over time or evolves regularly (Mathers and Robine 1997).
In addition, both the lay advisory group and the multi-disciplinary steering group regularly reviewed the evolving themes and thoughts on the illness narratives in the light of their areas of expertise, knowledge of the literature, and experience.
For a few years, we can regularly sample evolving vistas of what the artist Robert Smithson called construction sites: "ruins in reverse".
