Can a wolf pack kill a bear?

They could kill a cub but would never risk attacking a healthy adult. One swipe can crack a mooses skull imagine what it would do to a wolf ;)

^ wrong, if you were talking about a fully grown grizzly bear than perhaps yes, the answer above would be right, but any other type of bear would stand little chance against a pack of hunting wolfs such as the grey wolf. the black bear for instance could be killed by a lone wolf, if the wolf made a clean sneak attack while the bear was off guard. The wolfs agility vs the bears is an obvious win for the wolf, as it is able to jump about much more than the bear.