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Why are snails so slow?
Snails aren't built for speed – that much is obvious. But why are they so slow? Stuart Blackman takes a look.
World's most venomous spiders: Are these 10 deadly spiders as fearsome as their reputation?
Here are the most venomous spiders in the world, but just how deadly are they really?
We don’t know how great white sharks have sex, but what we do know about their mating ritual is terrifying
All we know about great white shark sex
Crocodile experts just made a huge discovery in the Caribbean Sea
A new DNA study has revealed two previously unknown species of crocodile, both hiding in plain sight on the islands of Cozumel and Banco Chinchorro off the Yucatán Peninsula.
13 amazing images from this year's Environmental Photography Award
Worms violently flushing sand out of their burrows wins top environmental photography prize.
Happy 99th birthday Sir David Attenborough – 14 inspiring quotes from the famous naturalist
Our favourite quotes from the legendary naturalist and broadcaster David Attenborough, as he celebrates his 99th birthday.
“After living almost 100 years on this planet, I now understand the most important place on Earth”: David Attenborough on his new film
An ambitious new film, Oceans with David Attenborough, is being released to celebrate the legendary broadcaster's 99th birthday on Thursday 8 May.
It's longer than a bed, covered in slime and has teeth in its throat – meet this giant hunter of the reef
This 30-kilogram predator hunts mostly at night, ambushing prey before swallowing it whole with its specially adapted jaws.
Why do ostriches have two knees?
Stuart Blackman explains why an ostrich's legs look so strange
How do whales breastfeed underwater?
Do whales produce milk? Do whales have nipples? How does it all work underwater? Read on to find out all the whale nursing facts you've been wondering about.
"It gives some hope": new population of near-extinct tiny chameleons discovered in Madagascar
The discovery of the Belalanda chameleons offers "a rare opportunity" to help conserve the species, say researchers.
It's only 15cm long, looks like a weird mouse, outlived the dinosaurs – and humans are descended from it
Meet the tiny mammal that survived the dino-killing asteroid to became our earliest ancestor
Forget Harry Potter these creatures have real invisibility cloaks: 10 weirdest invisible animals you can see right though
Nature's invisible act: here are 10 transparent animals who have mastered the art of transparency with their very own invisibility cloak
It's based on real killer shark attacks and was filmed in a backyard swimming pool: 13 facts you didn't know about Jaws
As Jaws celebrates its 50th anniversary, we take a look at behind-the-scenes facts of the blockbuster.
“Our silver bullet”: Experts are racing to save these native crayfish from invasive species that bring a fungal ‘plague’
The white-clawed crayfish is disappearing from Britain’s waterways. But we’re not giving up on this little crustacean just yet.
How many legs does a kangaroo have?
Scientists say kangaroos have a third leg masquerading as a tail.
Sea otters are suddenly flourishing along the Monterey Peninsula – for a surprising reason
The otters appear to be benefiting from the dramatic disappearance of another marine predator.
This creature might be tiny but it sure is mighty as it has a backbone strong enough to withstand being stood on by a 70kg human
Is there really a shrew that can survive being stood on by a 70kg human for five minutes? Nick Baker investigates
The mysterious ‘Asian unicorn’ hasn't been seen since 2013 – here's why scientists are desperate to find it
The almost mythical, horned saola has only been sighted a handful of times in the remote highland forests of Vietnam and Laos.
Weirdest ways animals give birth – are these the 10 craziest animal births ever?
From mouth-brooding fish to tadpoles bursting through their mother’s back, the animal kingdom has some bizarre birth stories
From venomous sex to maternal sacrifice: 7 fascinating facts about octopuses
From venomous mating rituals to post-birth starvation, these remarkable facts reveal just how weird and wonderful octopuses really are
“It was pure chaos!” Diver stumbles across huge tentacled animal in Australia
Underwater videographer shares incredible footage of the moment he discovers an enormous lion's mane jellyfish.
10 deadly, utterly terrifying prehistoric fish
The saying ‘there’s always a bigger fish’ rings particularly true when looking at these monsters from prehistory…
Scientists studied 164 mountain gorillas in Rwanda's Volcanoes National Park – here's what they found out about friendship
The research reveals complex positives and negatives of friendship in these critically endangered primates.