: 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.
Hognose snakes (Heterodon) are rear-fanged. The fangs have been referred to as just enlarged teeth, but they are genuine fangs that are used for prey restraint. Despite the common belief, there is no evidence to support the fangs being used for toad popping.