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The endangered giants that still lurk in the world’s biggest rivers

30 September 2020

The world's fresh waters used to teem with enormous fish. Their numbers are dwindling, but it is not too late to save the river monsters from extinction

The secrets of how sharks survived so many of Earth's mass extinctions

26 June 2019

Vegetarianism and liking underwater volcanoes have helped sharks survive for half a billion years. But can they use their skills to cope with climate change?

Why alligators, wolves and mountain lions are turning up in odd places

24 October 2018

Predators are thriving in places they shouldn't, revealing some serious misunderstandings about their behaviour and how to protect them

Special report: The new megaprojects changing the face of our planet

29 August 2018

Across the world, new roads, railways, dams and power lines are encroaching on previously virgin territory – with untold consequences for Earth’s wildlife

Is life on Earth really at risk? The truth about the extinction crisis

25 July 2018

Earth’s biodiversity isn’t just beautiful, it ensures human survival. But to protect nature’s bounty we first need to know exactly how we’re harming it

How dodgy sausages are saving a cute marsupial from toxic toads

18 July 2018

In a true-life alien versus predator story, a touch of food poisoning could save an endangered Australian species from a relentless toxic tide

Mussel pain: The crisis engulfing our freshwater molluscs

7 March 2018

Freshwater mussels are among the planet’s most endangered animals. Extreme conservation measures are the last hope for these unsung ecological heroes

Wildebeest no more: The death of Africa's great migrations

6 December 2017

Many of Africa's savannahs are emptying of wildlife as cattle fences kill its charismatic fauna. But we are finding ways to save them

Bustard or bust: The fractious battle to bring back a lost giant

29 November 2017

Great bustards are huge birds that once roamed the plains of Britain. David Waters’s long battle to bring them back has been stalked by controversy and upsets