The phrase "already diverging" is correct and usable in written English.
It can be used to describe a situation where two or more things are beginning to separate or differ from each other at an earlier point than expected.
Example: "The two theories are already diverging in their conclusions, indicating a fundamental difference in their approaches."
Alternatives: "beginning to differ" or "starting to separate".
The second WGD is estimated to have taken place between 74 and 147 million year ago, after ginkgoes and conifers had already diverged.
One play-through saw Germany declaring war on Yugoslavia on the historically accurate date even though events had already diverged so far from reality that Berlin was surrounded by a mixture of French and Soviet troops by early 1941.
If additional data support this hypothesis, then the presence of many of the ecological, morphological, and behavioral traits in iguanians suggests that the iguanians evolved independently within a group of squamates that had already diverged considerably from its squamate ancestors.
Talk of our shared commitment to the NHS also rings hollow the day after another Lords rejection of Tory health reforms – with no foundation hospital north of the border, welfare systems are the most visible ways the two countries have already diverged.
Scotland, however, has already diverged since devolution.
One view is that hagfish and lampreys are monophyletic, meaning that their lines did not diverge from each other until after their common ancestor had already diverged from our line.
The primordial opsin had already diverged into three classes (rhabdomeric, "photoisomerase-like," and ciliary opsins) before protostomes (including most invertebrates) and deuterostome (including vertebrates) diverged, at least 580 Mya.
Within a few thousand years, many of the ancient lineages had already diverged from one another, meaning that people from one group were not having babies with people from another (or at least, their mothers weren't moving around, since we're talking about mitochondrial DNA).
Their presence implies that the cnidarian and bilaterian lineages had already diverged.
