Environment
When these two cyclones collided off the coast of Australia, something extraordinary happened to the ocean
It's extremely rare for tropical cyclones to meet, but when they do, the results can be profound, a new study has found.
This photographer just returned from a jungle expedition in Cambodia – what he captured was astonishing
Jeremy Holden's remarkable images – part of a Fauna and Flora biodiversity survey – highlight the ecological significance of the Cardamom Mountains in Southeast Asia.
A rare, formidable-looking creature is clinging to life in California's High Sierra
The Sierra Nevada bighorn sheep is one of the most endangered animals in the US – now a new study reveals the charismatic species is battling a new and dramatic danger.
Scientists embark on first-ever study of Antarctica’s underwater avalanches. Here's why it's important
Underwater monitoring systems will be deployed in Antarctic canyons for year-long observations, say researchers.
Biologists went into 19 abandoned quarries in Germany – and they found something vital
The seemingly barren sites were home to an astonishing 114 species of bee, including 35 listed as endangered.
How eight farmers, some salt licks and a load of cows could breathe new life into the uplands of Britain
Scientists and farmers have come together to trial a new nature-based solution for managing bracken and boosting biodiversity. Here's what they're doing...
More than 100 of these secretive birds were tagged and followed around the planet. Here's why
The satellite tags transmit real-time location data, which has led to some surprising – and important – discoveries.
Chimp video shows one of the most complex tool-use behaviours by wild animals ever documented
The footage suggests chimpanzees are able to perform complicated sequences of behaviour similar to those that made humans successful, say scientists in a new study.
Europe's native oyster ecosystems have collapsed. Here's what that means for the ocean
The oyster reefs once covered an area larger than Greater London, but now they're only found alone or in small clusters, say experts.
An ancient and exquisite thing has been discovered in a lake in New Zealand
The extremely rare fossils were found attached to the underside of a leaf – in the very position they would have lived and died – near Dunedin on the South Island.
There's a cunning animal on the misty riverbanks of Ohio that hunts like a Roman gladiator
The creature in question creates a deadly trap to insnare its prey, a new study has found.
A complex sound is drifting through the forests of Hawaii – for the first time in years
Five ‘alalā, or Hawaiian crows, have been released onto the island of Maui, part of a greater effort to return the native birds to their forest homes.
Robots just collected something significant from the breath of these rare orcas
What they found could have profound implications on the future of this small population of whales off the west coast of North America.
Why evolution experts are so consumed by this deep-sea fish
The animal lives in almost perpetual darkness, up for 4km beneath the surface of the sea.
Humans didn't want to go into this mysterious jungle in Asia, so they sent a drone in instead
The drone had a winch attached to it – and on the end of the winch was a probe, used to collet DNA. Here's what the researchers were up to...
Researchers dropped a sound recorder into the Baltic Sea and left it there for two months – what they heard amazed them
They recorded 10,000 sounds, all made by the same animal...
An immense creature is moving through the vast swamps of the Everglades National Park
A new study suggests that the animal could be an even more adept hunter than experts in Florida first thought...
Orcas are now hunting whale sharks – and they're doing it in an astonishing way
A series of new photographs and videos captured in the Gulf of California show exactly how the killer whales are hunting the world's largest fish.
80 prehistoric tombs filled with bizarre animal skulls found in Wyoming
The chambers were built as refuges, but the animals that created them ended up getting trapped inside then fossilised for 230 million years, a new study finds.
Squirting cucumbers terrified the Romans – and this new high-speed video reveals exactly why
In the first century AD, Roman naturalist Pliny the Elder wrote of the squirting cucumber's ability to fire out seeds, "endangering the eyes”. Back then, many mysteries surrounded this strange member of the gourd family. Now, using cutting-edge technology, scientists say they've finally worked out how the plant's explosive mechanisms work.
This flying robot was deployed to a remote valley in Hawaii to collect one of the rarest things on Earth
The walls of the Waiahulu Valley on the island of Kaua'i are steep and inaccessible to humans, so scientists sent in a specialised drone to help with their mission.
Why this huge frozen whale in Alaska has got scientists so confused
Experts are trying to figure out exactly how the endangered fin whale died...
100 endangered crayfish just dropped dead in England – and people don't know why
Experts have quarantined some of the survivors to try and find out what's going on...
Which country has the longest coastline?
Which country has the longest coastline? Well, it depends on what you include, says Stuart Blackman