Jon Brodie from James Cook University says Australia needs to spend $1bn a year for the next 10 years to improve water quality

Terry Hughes from James Cook University calls the damage seen this year ‘off the scale’

Richard Vevers had never experienced anything like the devastation he witnessed on the dead and dying coral reefs around Lizard Island

With the Great Barrier Reef in danger, accurate information is needed, says tourism operator Paul Crocombe

Olympic gold medalist Stephanie Brown Trafton takes the Guardian US backstage during a test event at the Nílton Santos Olympic Stadium in Rio de Janeiro

Novak Djokovic says winning the French open was one of the ‘most beautiful’ moments of his career, after beating Andy Murray 3-6, 6-1, 6-2, 6-4 at Roland Garros on Sunday

Muhammad Ali’s coffin arrives in his hometown of Louisville, Kentucky

After beating world No1 Serena Williams 7-5, 6-4 in the women’s French Open final, Garbiñe Muguruza shows off the Suzanne Lenglen Cup in central Paris

This little flying machine, dubbed a “RoboBee”, has been designed to perch on a host of different surfaces, opening up new possibilities for the use of drones in providing a bird’s-eye view of the world, scientists say. The total weight of the robot is about 100mg - similar to the weight of a real bee

Alphabet’s flagship company presents Google Home, a speaker-turned-personal-assistant that will allow users to turn on their lights and surf the web, among other functions

Nicola Sturgeon says she wants a vote to remain in the European Union to be one of hope, with people enthusiastically going to the polls

Some 300,000 handmade poppies are on display at the Chelsea Flower Show, in honour of the armed forces

Tamal Ray, anaesthetist and baker, Professor Charles Spence, experimental psychologist at the University of Oxford and chef Jozef Youssef embark on a journey to decode the science of flavour

The annual parade of fashion and star power is out in force at the Met Gala in New York