“Every day, almost 5,000 citizens cross the frontier between the Federal Republic of Germany and the Netherlands.”

“For cottagers and campers, on the other hand, the opportunity to play explorer in an uncharted frontier was greatly appealing.”

“Cherokee women and European traders or frontiersman sought each other to gain access to goods or territory and to cement alliances.”

“This inexhaustible source of pure water was a marvel to Indian and frontiersman alike prior to the 19th century.”

“Another carving from the 1850s is thought to have been the work of Kit Carson, the famous frontiersman.”

“Encountering the lost language of the frontiersmen and frontierswomen shines a bright light on a dark corner of the past.”

“Those astronauts who died were explorers, pioneers and the last of the frontiersmen.”

“Did veteran Canadian frontiersmen know the words and gestures that led to successful surrender to Iroquois warriors?”

“To conclude, one of the so-called benefits of adopting the euro has always been that prices can be compared across frontiers at a glance.”

“Space exploration and exploitation is a major driving force in advancing the frontiers of knowledge.”

“Where was the consortium of great powers which had once established, or at least formally ratified disputed frontiers?”