: difficult in a way that is usually interesting or enjoyable. Thesaurus: All synonyms and antonyms for challenging Nglish: Translation of challenging for Spanish speakers Britannica English: Translation of challenging for Arabic speakers.
To illustrate the tremendous indirect impact of emerging zoonotic diseases on public health policy and structures and on public perception of health risks, the authors provide a number of examples, including that of the Ebola virus, avian influenza, monkeypox and bovine spongiform encephalopathy.
The newborns, which are part of a cooperative breeding program to enhance genetic viability of zoo animals, are the first gorillas born at the Bronx Zoo since 2006. The babies represent the 14th and 15th born at the zoo's Congo Gorilla Forest exhibit since it opened in 1991.