The mechanisms by which the small micromeres make their way to the coelomic pouch is a topic of debate: one paper cites an active migratory event while another a passive translocation during gastrulation (Yajima and Wessel, 2012; Campanale et al., 2014).
Household disaster preparedness and its influencing factors have been a topic of geography and one of the central focuses of disaster studies.
I now go to school in Holland, and in my university the whole tradition of Zwarte Piet became a topic of conversation during one of my classes.
In the interest of fairness, I have to report that, as a student at Princeton in the mid-70's, I encountered Shapero's Symphony for Classical Orchestra in B-flat major as a topic of study in not one, but two courses, one taught by J. K. Randall and one by Milton Babbitt.
The NSF-CBMS Regional Research Conferences in the Mathematical Sciences are a series of 5-day conferences, each of which features a distinguished lecturer delivering ten lectures on a topic of important current research in one sharply focused area of the mathematical sciences.
This is a topic of enormous controversy, but one can begin to get a grasp of it by noticing that thoughts are typically referred to, or expressed by, sentential complements, or clauses beginning with that.
In his piece, Jones describes being called a slut when, after the topic of one's sexual headcount came up as party banter, he estimated that he'd slept with 400 guys.
For example, a topic of "the adoption rate of one-eyed teacup poodles in [city]" is likely too narrow for a paper.
Twitter's business model (or rather lack of one) is a topic of endless debate.
Moreover, this is a topic of national interest and importance; one we can't afford to leave to the personal whims of wealthy individuals.
