it is thus not for sceptical researchers who seek purely scientific analyses.

How would the previous sentence be correctly capitalized?
Answer: It is thus not for sceptical researchers who seek purely scientific analyses.
did someone email you a wdl file and you're not sure how to open it? maybe you have found a wdl file on your computer and wondering what it's for? windows might tell you that you can't open it, or in the worst case, you might encounter a wdl file related error message.

How would the previous sentence be correctly capitalized?
Answer: Did someone email you a WDL file and you're not sure how to open it? Maybe you have found a WDL file on your computer and wondering what it's for? Windows might tell you that you can't open it, or in the worst case, you might encounter a WDL file related error message.
the black guillemots, normally having around 10 nest at the landingplace, have this year maybe 5.

How would the previous sentence be correctly capitalized?
Answer: The black guillemots, normally having around 10 nest at the Landingplace, have this year maybe 5.
in contrast, renewable energy technologies provide the opportunity for a development path that is more culturally self-determined, giving individuals and communities control over their own energy sources.

How would the previous sentence be correctly capitalized?
Answer: In contrast, renewable energy technologies provide the opportunity for a development path that is more culturally self-determined, giving individuals and communities control over their own energy sources.