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Its legs are as thick as wrists and it's able to rip monkeys from branches with its deadly talons: Meet the world's most powerful bird
What are harpy eagles? Where do they live and just how big are they? Learn all about this iconic eagle in our expert guide
How to help a beached, stranded whale or dolphin - and help save its life
A beached cetacean is a distressing sight, but there are ways you can help until the marine medics arrive, says British Divers Marine Life Rescue (BDMLR)
The monstrous, snake-like huge 8m long serpent fish that are known as “harbingers of doom”
Meet the mysterious oarfish, the deep swelling sea serpent that's known as harbingers of doom”.
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10 deadliest cats in the world, including one that kills every 50 minutes: Meet the world's most efficient feline killing machines
Meet the planet’s fiercest and most ruthless felines
"Observations suggest that they can float to the surface for air and then sink down again – all without waking up…"
How exactly have these notoriously aggessive animals evolved to function under the water?
It's as sleek as a torpedo, as long as a bus, and weighs the same as an elephant: The ocean creature that slices through water at a speedy 35 km/h
Our guide to the minke whale, the UK's most frequently spotted whale
“The village of Happisburgh is falling into the sea.” The changing face of England as sea levels rise
Kate Bradbury on the importance of the UK’s marshes – and the efforts being made to try and save them
"Water will evaporate, leaving a dry barren surface - it will become an even hotter version of Venus…" 10 ways Earth – and life on it – could die
T.S. Eliot wrote in his poem The Hollow Men that the world would end “not with a bang but a whimper” – the question is, was he right?
It contains over half of Earth’s water and all of the continents could fit into its basin in one mega-puzzle
The world’s largest ocean is home to incredible wildlife and is crucial to the Earth’s climate system
It has a fleshy beard hanging from its face and sounds like a car alarm – meet the bizarre bearded bellbird
This male bird’s wattles of flesh dangling from its beak and its bonkers call are both intended to impress females.
When a pride of lions went down to the waterhole, they bumped into a hippo. Here's what happened next
Young lions need lots of practice to hone their hunting skills. This safari group was in for a spectacular show watching their attempts.
It looks like something from another planet, eats with a beak and spits out every bite – and has teeth in its throat… nature doesn't get much stranger
Sunfish can grow more than three metres long and weigh almost 3,000 kilos
Why aren't there any penguins in the Arctic?
Ever wondered why the Arctic doesn't have penguins? Ellen Husain explains
10 biggest wild dogs on the planet, including one beauty close to extinction – "Their eerie howling from a wintery mountainside brings a shiver to the spine…"
Discover the biggest and most ferocious members of the dog family
It's 12km long, contains 37,000 homes and 74,000 individuals: The bustling, colourful metropolis you've never heard of…
Stretching across a dramatic 12-kilometre landscape, this vibrant and densely populated community operates with the efficiency of a major urban centre.
Record-breaking runs, swimming successes and theatrical tussles: These 13 beautiful photographs reveal the leopard’s astonishing athletic abilities
The enigmatic leopard is a master of stealth – but photographers are occasionally able to capture their striking beauty in the wild
Only two complete dodo skulls are known to exist. Scientists just looked inside them – and discovered this
It turns out these flightless, supersized pigeons may have been a lot smarter than people think…
It stretches a whopping 106 square metres and spans two countries – and it's home to over one hundred thousand scuttling residents
This epic animal home lies in a huge cave system underneath Albania and Greece
It grows to 2m and weighs 200kg… but its greatest weapon devastated an entire ecosystem
The sacred fish that has collapsed an ecosystem
"You can hear them talking to each other through your hull.” Sailor alone at sea for a week. Then this happens
One week into a 10,000-mile solo voyage across the Arctic Ocean, this sailor had a wildlife encounter to remember.
Researchers followed humpback whales to the seabed – and saw them hunting in a way never seen before
Scientists just saw – and filmed – humpbacks cooperatively hunting along the seafloor for the first time.
It may look like a dog, but don’t be fooled – Africa’s most efficient killer, which can travel up to a staggering 72km/h, is neither a wolf nor a dog
The largest canid in Africa is also classified as Endangered. In our African wild dog guide, learn more about the species, including diet, habitat and why they're endangered.
Is there a lion in your living room? How your pet cat has more in common with their wild cousins than you might think
How wild is your cat? John Bradshaw reveals why our feline companions have not lost touch with their wild side
Penguins are taking over a beach town in South Africa – and the locals love it
In Cape Town, the local penguins have found a place in many people’s hearts, helping to secure their future
