So what constitutes a cause and what constitutes an effect depends on the total system of explanation in which the putative causal sequence is embedded.
These researchers therefore speculate that the putative impact and associated crater may have contributed to this separation by weakening the crust at this location.
Within the eastern group, variation was only about 0.65%, even though examples of the putative subspecies "palustris", "coloratus", "sanibeli", and "planirostris" were all included.
In this approach a protein sequence database is used to calculate all putative peptide candidates in the given setting (proteolytic enzymes, miscleavages, post-translational modifications).