But this exploration has not been seriously undertaken.

This consortium lasted 4 years until 1997 when the seismic exploration of the Caspian Sea was undertaken.

The first concerted extragalactic exploration was undertaken, and entire civilized planets made the jump into deep space.

The exploration of psychological effects of form and space was undertaken by architects in their buildings, projects and films.

In forlorn hope of reaching some deeper truth, further exploration was undertaken.

Due to the difficulty involved in exploration, relatively limited "on the ground" exploration has been undertaken.

No exploration is undertaken, for example, of any possible kinship between the minds of the cop and the criminal.

Since 1997 exploration of one of the central insulae of the town has been undertaken.

No meaningful exploration for chrome has been undertaken for several decades.

But this needed settled weather, and a month must pass before this exploration could be profitably undertaken.