1. (Pharmacology) a drug, agent, or nerve that can cause dilatation (vasodilatation) of the walls of blood vessels. 2. (Physiology) a drug, agent, or nerve that can cause dilatation (vasodilatation) of the walls of blood vessels.
As part of their proposal to âreintroduceâ 750 Mexican wolves, these scientists want to have a self-sustaining population of 250 wolves in southern Utah and northern Arizona â places that fall well outside the predatorsâ historic range.
Grizzly bears are much more aggressive, but there are no grizzlies in Utah, only black bears, and until now they've never killed anyone in Utah. In other states and Canada, black bears have killed about 60 people in the last century, more than half since 1990.