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Its wingspan is wider than a double bed, it weighs as much as a 2-litre bottle of water and it lives in some of the harshest climates on the planet
El Niño: It starts in the Pacific but can affect the entire planet… The strange climate phenomenon that can wreak havoc with wildlife and weather
Mark Carwardine reveals what impact this series of climatic changes has on wildlife.
It's as big as Egypt, home to 350 people and the world's deadliest bear. This is the biggest national park on the planet – and no, it's not what you think…
If you think the largest national park on Earth is Yellowstone, think again – as it doesn't even come close...
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"At 8 times their body length, this flexible appendage is at risk of being snapped off." Which animal has the biggest penis? (It's probably not what you think)
Penises come in a remarkable range of shapes and sizes, says Stuart Blackman, as he investigates which animal has the biggest
Why are huge animals so darned rare?
Henry Gee takes a look at why there are so few big animal species
Crocodile snatches wild dog from riverbank in Zambia. Then its pack turns up to try and save it – watch the agonising footage…
In footage captured for BBC's Kingdom, a wild dog is caught in the jaws of a crocodile – can his pack members save him?
It lived millions of years ago, was the size of of a brown bear and the largest dog ever; able to crush bone with its deadly teeth – but was wiped out by cats
Similar in size to the fictional dire wolves from George R. R. Martin’s A Game of Thrones, Epicyon is widely considered the biggest canid of all time…
Dolly Parton helped save endangered bald eagles. Here’s how…
The country singer was known for her philanthropic efforts – including conserving the bald eagle
It is the largest, most formidable, cat in the Americas and one of the world's most powerful predators, able to bite straight through the skull of its prey
Our guide to the largest cat in the Americas – the jaguar, including how to identify, their diet and best places to see them in the wild.
This ocean titan has 9 brains, hunts sharks at night and can grow as long as a school bus
The largest specimen ever found reportedly measured 9.75m long and weighed 272kg. Here's everything you need to know about the giant Pacific octopus.
“Something I will remember for the rest of my life.” Rare wild Przewalski’s horse born in central Kazakhstan for first time in 200 years
The birth of a Przewalski’s horse foal in Kazakhstan marks another step in the restoration of this rare species.
91 hilarious, award-winning wildlife images will be displayed in London. Here’s how to see them
An immersive exhibition celebrating the Nikon Comedy Wildlife Photography Awards is coming to London
A group of sea turtles were tagged in the Galápagos. When experts looked at the data, they noticed something odd
Satellite tags reveal ‘homebody’ nature of some Galápagos sea turtles.
When a colossal iceberg broke free in Antarctica, scientists found something astounding beneath it
With the help of a remotely operated vehicle, the researchers discovered a breathtaking world hidden under the ice for centuries.
Nature's 10 bizarrest days scientists struggled to explain, from when it snowed spiders in Brazil to the day thousands of toads exploded in Germany
From exploding toads, raining spiders and birds dropping from the sky, these are the 10 weirdest days in nature and why they happened
It weighed the same as a BMW, was taller than Brad Pitt and had enormous horns. The terrifying, prehistoric aurochs that survived until the 17th century
Their descendants are some of the most intensively farmed animals in the world, yet just a few thousand years ago these giants roamed free…
It looks like a woodlouse, but is the size of a pet cat and has an impressive 14 legs – and can take on a shark if desperate…
Nick Baker takes a look at the super-sized crustacean that lives in the deepest, darkest ocean: the giant isopod
It's a terrifying, ruthless, 3-metre long, deep-sea predator that can slice its prey in half – and its venom can cause permanent numbness in humans
The Bobbit worm is a fearsome marine predator that burrows into the sand and waits for unsuspecting prey. Stuart Blackman explains all you need to know about this terrifying marine worm
Scientists tag 6 ‘unicorns of the sea’ and follow them 1,500m into the deep – to places humans can’t go
Narwhals recorded Arctic ocean data which will be used to help inform climate research in the region
These monkeys turn into meat-eaters when plants are scarce. There’s something very human about it, says scientists
Scientists find that capuchin monkeys hunt for meat when plants are scarce
It has supermodel legs, walks like a camel, hunts like a cat and – bizarrely – loves fruit. Meet one of the weirdest dogs on the planet
James Fair tracks down the enigmatic and strange maned wolf
Swift or swallow? What’s the difference between these two remarkable birds that travel thousands of miles?Swift vs swallow:
Know your swallows from your swifts? Tom Hibbert from The Wildlife Trusts takes a look at some of the differences…
"It had two gigantic 20cm fangs that it used to tear apart its prey." 10 horrifying, terrifying prehistoric sea monsters that once ruled our oceans
The seas have been home to some monstrous creatures over the course of the last 500 million years. Here are 10 that you’ll be glad are long extinct…
Scientists hid cameras in an abandoned house in Argentina – and found carnivores sharing a room inside it
Images captured in the house show black vultures sharing a nest site with American barn owls. In another abandoned structure, the researchers recorded black vultures nesting beside Chaco eagles.
