radio: Hunting The Beagle, Radio 4 Monday 3.45pm.
This documentary follows maritime historian Robert Prescott as he tracks down the Beagle's last resting place.
HMS Beagle twice circumnavigated the globe, but she's most famous for the five-year voyage during which the ship's scientist, Charles Darwin, formulated his ideas on evolution.
After her final voyage in 1843, she sailed quietly into oblivion.
But one man is sure he knows exactly where she is now. After nearly a decade of painstaking detective work, Dr Prescott believes the timbers of the Beagle lie buried in the mud of the Essex marshes.