Last week, a dead dolphin was found washed up on a beach near Raglan. It was a female, and thought to be a Māui dolphin, which makes the death potentially significant for the population—only 11 breeding-age Māui females were found in a 2015 study, and there are thought to be about 60 adults left. Can Māui dolphins recover? It's complicated...


	Deep trouble for dolphins Last week, a dead dolphin was found washed up on a beach near Raglan. It was a female, and thought to be a Māui dolphin, which makes the death potentially significant for the population—only 11 breeding-age Māui females were found in a 2015 study, and there are thought to be about 60 adults left. Can Māui dolphins recover? It's complicated...


	Why some trees live longer than others While sequencing the genome of the English oak, a tree that can live for hundreds of years, French researchers noticed a burst of gene duplication within plant-disease resistance genes.


	Now you be the judge There are 52 finalists in Photographer of the Year 2018, but there can be only one People's Choice winner—the award we're counting on you to judge. See all the finalists and vote for your favourites here. Photo: Dave Bull, Landscape category finalist

The last dolphin

Kelly, the last dolphin held in captivity in New Zealand, was the embodiment of our changing attitudes to marine life.

How to spy on dolphins

Thanks to a database of 50 million echolocation clicks, identifying wild dolphins from afar is close to being a reality.