The idea of human space exploration did not begin with the cold war.

He has written several books on the history of space exploration.

The year was one of exploration and learning for the team.

No one ever had, not in a century of exploration.

And I'd get on with the job of real exploration.

The 1960s were a new age of exploration and freedom.

After three years of exploration, she made her return official.

It was not hard for him to do, when he had a day of exploration ahead.

The name was in use during the early period of European exploration.

The effects of exploration on the species are not yet clear.