The question on many minds this week is why did some of the world's richest men risk death to venture to the bottom of the sea in a cold and cramped "experimental" submersible for a chance to glimpse the wreck of the Titanic? The "unsinkable" ship that sunk on its maiden voyage across the Atlantic in 1912 after colliding with an iceberg is arguably the world's most well-known boat.
The Titanic is recognisable to more of the world's population than, say, the Nina, the Pinta, and the Santa Maria (Christopher Colombus's fleet that launched the Spanish conquest of the Americas), or Captain Cook's HMS Endeavour (the tall ship that set in motion the British conquest of Australia). The Endeavour's long-forgotten wreck was found scuttled off the coast of Rhode Island just last year.