A rescue mission in 1939 to save the crew from the USS Squalus after it sinks to the North Atlantic floor.
In the 18th century, three Frenchmen set off to measure the shape of the Earth.
In 1892, Fridtjof Nansen plans a dangerous expedition to the North Pole.
Captain James Cook accurately charted New Zealand, unexpectedly discovered the Great Barrier Reef and found thousands of new samples of flora and fauna.
Ferdinand Magellan was the first to circumnavigate the globe.