Suppose that the standard explanation of global warming was human activity, but that subsequently a complete, completely adequate, nailed down explanation in terms of solar cycles emerged.
One obvious explanation is that human capital in 1900 predicts human capital today and that current human capital differences explain the gap between the U.S. and Argentina.
The popular explanation is that human activity has over-fished the creatures' predators and that pollution has de-oxygenated the water - which eliminates their competition.
One possible explanation is that human population was partially protected in 1968 against H3N2 strain due to antibodies to N2 allele acquired after the 1957 pandemic [31].
It is possible that H2Kd transferred to the huCD45 cells and at the same time these cells lost their HLA antigens but this is unlikely and the more parsimonious explanation is that human CD45 is capable of transferring to mouse bone marrow cells.
Another possible explanation is that human negative regulatory elements within the BAC are non-functional in mouse.
An explanation is that human breast and rat mammary cancer susceptibility are controlled by overlapping and non-overlapping genetic mechanisms.
One possible explanation is that human cells also express INPP5B that could partially substitute for OCRL1 function during cell division.
The most likely explanation was that, as the human population spilled out of Africa, the colonisers had interbred with indigenous Neanderthals.
The slowly emerging explanation is that humans and other animals have much the same set of protein-coding genes, but the human set is regulated in a much more complicated way, through elaborate use of DNA's companion molecule, RNA.
