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11 of the biggest animals on Earth – number 4 is absolutely massive!
From river giants to land-dwelling beasts, these are the biggest creatures walking, swimming and flying across our planet today.
A Roman scholar proposed this nature theory more than 2,000 years ago. It took until 1999 to prove it
Mathematicians have long been fascinated by the geometry of natural forms. And the hexagon reigns supreme.
Dynamite whales, exploding toads, suicide ants, bomb rats: 10 most explosive animals on the planet (and yes they make a mess)
Explosions are messy at the best of times, but when the thing exploding is an animal, or part of an animal, it rarely ends well.
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It looks like a spider and moves like a spider, but this is no spider – instead it's an evolutionary nightmare. Watch the deadly reptile killer in action
A flycatcher thinks it's found a spider for lunch – but all is not what it seems...
“It was an intense pain. Almost like burning. It took me a moment to understand what exactly was going on. A real ugly fish. Big eyes, big teeth.”
Meet the The fearsomely fanged, five-foot long freshwater shark.
It's huge – the size of a dustbin lid – has 21 arms lined with deadly barbed spines capable of causing severe pain - but that's not its most alarming feature...
A sting from this huge starfish could cause pus, bleeding and anaphylaxis. But that’s not the only reason to be VERY worried
Was a taxi driver from Washington, USA, the biggest ape who ever lived?
Stuart Blackman takes a look at the contenders, past and present, for biggest ape in the world - including the real King Kong
It might look like an insect, but this is no insect - it's flower hell-bent on deceiving males
Have you noticed some flowers look like insects? It's all to do with sexual deception says Phil Gates
“It’s by far the largest I’ve ever seen in my 25 years as a marine biologist..." New 4-metre giant, 400-year-old, creature discovered
A coral over twice the height of an adult – and possibly 400 years old – has been found in the depths of Fiordland
Meet the mighty, majestic Andean condor, one of the world's most powerful and impressive birds and at 15kg the heaviest bird of prey
The mighty Andean condor – the heaviest bird of prey in the world and the raptor with the longest wingspan – needs little introduction, says Mike Dilger. Learn all about them in his expert guide - including where to see them
Camera traps hidden in Amazon rainforest. They just captured an elusive animal doing something unprecedented
For decades, the short-eared dog has been regarded as one of the rainforest's greatest mysteries.
"It kills prey by wrapping around its body and squeezing until the victim has a heart attack…" The 10 most dangerous, deadliest animals in Borneo
While some of these animals are famously dangerous, others might be a bit of a surprise...
It looks like a pinecone and is the most trafficked mammal in the world – now scientists have just found a new species
New DNA analysis could help conserve this endangered mammal
"When they use these spines, they puncture them really deeply into their attacker. They can deliver venom into the wound"
10 gigantic, deadly and terrifying sea monsters that were inspired by humongous real-life ocean animals
These real-life ocean animals were so terrifying to seafarers that they became embedded in history as legendary sea monsters
Deep in the New Mexico desert lies a hidden kingdom of 119 ancient caves – home to aerial hunters that catch prey at 60mph
Carlsbad Caverns National Park in the US state of New Mexico is home to a whole host of eye-catching animals – including thousands of Mexican free-tailed bats.
You’ve never seen polar bears like this: 14 captivating photos that reveal the deadly apex predator's softer side
Polar bears might rule the Arctic, but they also have a surprisingly tender side – captured here in 14 striking moments in the wild
"Within minutes, the asteroid created a 1.5 km curtain of rock that collapsed into the North Sea, creating a tsunami taller than Big Ben"
Did a huge asteroid really strike the North Sea millions of years ago?
It looked & acted like today’s moles – but this was the first: a Jurassic mammal built with supercharged digging arms for life beneath the dinosaurs
The mole that sheds light on how mammals evolved...
"After getting the go-ahead, it will drop its act and use its large canines to tear chunks of flesh off its unsuspecting client." Nature's 10 biggest, greatest liars and con artists
Not everything is quite as it seems with these master manipulators…
"It's claimed there's one deadly snake for every square metre..." World's 6 weirdest islands, from lethal snake island to the bizarre swimming pig isle
From venomous snake-infested rocks to islands full of swimming pigs, the world is home to some seriously strange places
BBC launches new wildlife video podcast as part of the Watches expansion
Naturewatch will begin this autumn, highlighting the best of British wildlife each week
Fierce, majestic – and built to kill – The world's biggest and mightiest birds of prey
All you need to know about the magnificent birds of prey, including the biggest in the world
You're never really alone on the Appalachian Trail: 14 incredible animals to spot on North America's most famous hike
The forests, ridges and remote mountains that surround the Appalachian Trail are a haven for wildlife, including black bears, moose, owls and bobcats.
