Further exploration from Alta California took place during the 18th century.

Campuses are where such explorations of ideas have historically taken place.

Little exploration took place for the next two decades.

Belgian exploration, exploitation, and administration took place from the 1870s until the 1920s.

For the next 35 years very little exploration of the river took place.

Our explorations simply haven't taken us as far as yours have.

In the 1960s the first geological exploration for minerals took place in the area.

Therefore, scientific exploration only takes place gradually, and requires subsequent protective measures.

My exploration soon took a systematic form, as I intended that it should be exhaustive.

The exploration of Mercury has taken only a minor role in the space interests of the world.