Sales of printed books fall by more than £150m in five years

New figures from Nielsen BookScan show continuing decline since 2009 as more and more readers migrate to ebooks

Going, going, gone: how Sotheby’s and Christie’s still lose out on big sales

Despite increasing prices of art, big profits do not always trickle down to auction houses – thanks to generous guarantees to ultra-rich sellers

Climate change is lifting Iceland – and it could mean more volcanic eruptions

Land moving upward faster than researchers expected at 1.4in every year, allowing ‘hot potato’ rocks to rise

Cartier owner’s shares hit by Swiss currency turmoil and Hong Kong protest

Shares in Swiss watchmakers were hardest hit, because the central bank’s decision to scrap the currency cap will make their goods more expensive in vital foreign markets

Plan to put Tasmania’s south-west on tourist map fires up wilderness debate

A draft plan of management for the world heritage-listed area has opened a deep divide between conservationists who claim it is the greatest threat to the region in decades and tourism operators who say the proposed changes are long overdue