Workers process tuna at the Thon des Mascareignes factory in Port Louis, Mauritius.
Slavery, indenture and industrialisation have all contributed to Mauritius' multiculturalism - and to its deep social tensions.
Nitrogen pollution is one of the factors driving outbreaks of crown-of-thorns - giant starfish that devour the reef.
Kenneth Taylor Jr/Flickr
The latest Great Barrier Reef report shows some improvements to water quality over the past five years, but there's still a lot to do on one particular problem: nitrogen.
Research has discovered a bacterium that can be used to reduce the amount of fertiliser used in the production of sugarcane…
Two of millions of cane toads found across northern Australia.
Mark Lewis, Radio Pictures, Mullumbimby
When cane toads were released in Australia in 1935, they were the latest innovation in pest control, backed by a level of consensus support that a scientist could only dream of. So what went wrong? Research…