Unique underwater world discovered in Pitcairn Islands

Expedition reveals 80 new species of fish, coral and algae in the pristine waters of British overseas territory in the Pacific Ocean

Do farmers really need bee-harming insecticides?

Syngenta says some farmers have no choice but to use banned neonicotinoids, which are linked to declining bee populations. But is it true that no alternatives exist? With your help, Karl Mathiesen investigates.

Let us know your thoughts. Post in the comments below, email karl.mathiesen.freelance@guardian.co.uk or tweet @karlmathiesen

Flying colours: aviation and Rajasthan inspire Louis Vuitton show

Luxury brand’s spring 2015 collection at Paris men’s fashion week inspired by men’s style director’s travel to India

Inhotim, Brazil’s giant open-air art gallery

Set amid 500,000 acres of botanical gardens near Belo Horizonte, where England play their final World Cup game, a visit to the remarkable Inhotim will cheer up dejected footie fans

Gucci dives into safe waters with men’s nautical theme at Milan fashion week

The captain, pirate and first mate look are reworked, while over at Emporio Armani an urban wardrobe is unveiled

Healthy holidays: Grayshott spa does a soft take on Teutonic health farms

Our writer submits to a strict seven-day regime of fasting, abdominal massage, and lectures on nutrition when she checks into a retreat in the peaceful Surrey countryside

Plus: healthy holidays in Switzerland and Portugal