Another word for explored

The hinterland of Liberia has been but slightly explored for mineral wealth.

The Kennebec was first explored to this point in 1607.

He took her arm with one of the hands that had explored every part of her body – or the body he thought was hers - not even a few hours before.

Kennedy explored the northern tributaries of the Darling, and a river in S.

Boyd Alexander, a British officer, further explored the lake, which then contained few stretches of open water.