But since 1995, thanks to vigorous conservation efforts, the number of black rhinos has gone up again, to around 3,700.
Only after Thoreau's death, in 1862, and thanks to vigorous championing by his family members, Emerson, and later readers, did "Walden" become a cornerstone work of American nonfiction and its author an American hero.
That epidemic appears to be tamed thanks to vigorous vaccination practices, but it serves a potent warning that even preventable illnesses inevitably re-emerge when we let down our guard.
Only two days after my arrival in this region, where rocky mountains tumble to a wide, sandy seacoast, my skin had turned a shade of hot pink, thanks to vigorous scrubbings, followed by repeated plunges into water hot enough to leave me feeling lightly poached.
Staying at such mom-and-pop places felt like stealing, thanks to the vigorous United States dollar.
While American companies pour billions of dollars into Baku, the American government is barred by Congress, thanks to its vigorous Armenian lobby, from giving almost any state aid to Azerbaijan.
A report issued on Friday by the United Nations AIDS agency, Unaids, noted that thanks to a vigorous effort by donor nations and international organizations, the global annual rate of new cases of H.I.V. dropped by 25 percent over the last decade.
This question, so urgent to women writers, so tedious to male editors and pundits, is getting its latest workout thanks to the vigorous tweeting of bestselling popular novelists Jennifer Weiner and Jodi Picoult about the accolades heaped on Jonathan Franzen's new novel, Freedom.
The second mechanism available to disrupt agglomeration is magnetic shaking, thanks to the vigorous impact between particles.
