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They have strange beaks, bizarre bodies and can plunge more than 2.5km into the deep ocean… Are these the world's strangest whales?
They both spin silk, but what's the difference between spider silk and caterpillar silk?
What is silk? Is caterpillar silk the same as spider silk?
Richard Jones takes a look
How many wild dogs are there in the world? Scientists can't even agree…
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"It's small enough to hold in your hand, but equipped with an underwater surveillance system worthy of a deep-sea spy…"
Does it really need this number of eyes?
It was the size of a car and had claws bigger than your arm – and no other creature like it has ever been found
This 2.6m-long prehistoric predator was the largest arthropod ever known, with enormous claws and the power to dominate ancient seas
It barks like a dog and howls like a human – and is a silent, deadly hunter
Meet the very aptly-named barking owl
What’s the biggest, heaviest eagle in the world? Meet the contenders – including a giant with a monster 3-metre wingspan
Eagles are one of the most majestic birds in the sky. We take a look at the biggest and most impressive
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”.
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.
"Their lipid- and protein-laden bodies create unique, nutrient-rich ecosystems that may sustain creatures of the abyss for decades…"
Ever wondered what happens when a whale dies in the ocean? Joanna Bagniewska explains
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
