European exploration of the area began in the 16th century.

Exploration of the interior did not begin until after 1900.

European exploration of the interior began in the mid-19th century.

The first systematic exploration of the cave began in 1955 and went for five years.

Archaeological exploration of the area began in the nineteenth century.

Rose's musical exploration and exposure to new music began with her move to London.

But once night falls and their sexual exploration begins, we discover that all is not as it seems.

Aside from visits by mountain men during the early-to-mid-19th century, organized exploration did not begin until the late 1860s.

Democrats counter that even if exploration begins today, no new oil from Alaska will be available for years.

Exploration began in the area with a camp being set up in 1995.