He was now probably the world's leading authority on the greatest explorer of all time, and knew whole sections of the Journals by heart.

To this day he's still recognised as one of Britain's greatest explorers.

To him, "the greatest explorers are people like this who just listen and learn, and don't impose."

Nevertheless, Hard admired Bolt as the greatest explorer, and tried to follow in his steps.

The greatest explorer of our oceans the world has ever known.

Imagine following in the footsteps of the world's greatest explorers, and time permitting visit a scientific base.

He says, "The early astronauts were the greatest explorers ever.

He was the greatest explorer ever, a man of extraordinary courage and will, driven by God and his own vision.

"Are you going to refuse one of the greatest explorers and pioneers in Starfleet history?"

I know they were the world's greatest explorers up until the fifteenth or sixteenth century.