titanic 'Titanic' director James Cameron 'struck by the similarity' of historic disaster and Titan sub tragedy Rusty Blazenhoff
boats Fantastic photos of newly-discovered 19th century shipwrecks at the bottom of Lake Superior David Pescovitz
robots A robot found the "holy grail of shipwrecks" containing billions of dollars in cargo David Pescovitz
travel Atlas Obscura – The intriguing website of life oddities moves to illustrated book form Sara Lorimer
sharks Divers hunt for fossil teeth from the ancient world's largest shark—and find plenty Xeni Jardin