Other times, we are able to provide rescue only after years of investigation. (thepuppymillproject.org)
But now, after a few years of investigation, it appears that this technology is not a viable option for larger scale power generation. (ecogeek.org)
The result is the culmination of years of investigation by the team searching for water and other volatiles in volcanic glasses returned by NASA Apollo missions in the late 1960s and early 1970s. (news.brown.edu)