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"Sand pours off and disappears below like an underwater waterfall. This eerie phenomenon looks like a monstrous plume of smoke being dragged down into the darkness"
Plummeting down for more than 200 metres, Dean’s Blue Hole in the Bahamas is one of the world’s deepest blue holes
Nearly as big as Wales, hotter than 50°C – Inside the inhospitable and rugged Death Valley, where not everyone gets out alive - yet inconceivably wildlife thrives
Welcome to one of the harshest, hottest most inhospitable places on Earth
"The only way a female avoids starvation is by being fed by males hoping to mate with her. Females might have up to five males in attendance..."
Often male birds are more colourful than their female counterparts, but the ecelctus parrot bucks the trend, as zoologist and broadcaster Lucy Cooke explains.
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Do eggs really need sperm? Can they manage without?
Discover the intricate relationship between eggs and sperm.
"Both are large, heavy, beefy animals with thick skin, pillar-like legs and enormous heads..."
Both are big, intimidating and dangerous at close quarters...
Underwater robot discovered record-breaking creature the size of a car that could be thousands of years old, one mile down in the Pacific Ocean
All you need about the biggest sponge in the world
"The ghostly trunks of a vast forest, submerged for tens of thousands of years, rose out of the sediment. These mighty trees had lived for hundreds of years before their watery grave"
The mystery of 60,000-year-old trees that still smell like fresh incense
10 deadliest, most venomous spiders on the planet: Are these dangerous spiders as fearsome and lethal as their reputation?
Here are the most venomous spiders in the world, but just how deadly are they really?
Are humans still evolving or is this as good as we get?
It’s often said we’ve transcended our biological constraints and stopped evolving, but that’s simply not true…
“This colossal, complex city – the size of 2 tennis courts with thousands of rooms, from classrooms to ventilation units – was built by millions of hard-working architects”
Crow vs raven: what's the difference between these two very similar-looking black birds?
Don't know how to tell a crow from a raven? Stuart Blackman explains how to tell the difference between these two common corvids
This 2-billion-year-old giant is 14km long and rises almost 3km into the sky. And it's home to a hairy carnivore
Some of the planet's rarest – and strangest – animals and plants live on the top of South America's otherworldly Mount Roraima.
“More than 60% of females gave birth on the same night.” Why do some animals give birth en masse?
This smart reproductive trick can overwhelm predators – or cause a headache for expectant mothers
What's the slowest bird on the planet? Clue – it's also a pretty slow walker and fairly dumpy...
Contenders, ready! Stuart Blackman ponders which bird would win the slow race of the skies
Do lemmings really have a death wish and jump off cliffs?
Do these small mammals actually jump to their deaths? We investigate
“I glanced in the mirror and saw a huge, deadly creature crawling out of my shirt. I've never disrobed so quickly in my life.”
Wildlife photographer Guy Edwardes on bad weather, big spiders and a brush with the police
“Security tapped me on the shoulder. A deadly green mamba was slithering across the desk”
While attending the UN Environment Assembly in Nairobi, Luke Foddy had a run-in with a green mamba. Or was it?
“It was moving like a worm and a mole simultaneously.” This strange creature has a pair of ‘hands’ and uses its head as a battering ram
This freakish mole-worm hybrid is well-equipped for burrowing life
“Faced with a rugby scrum of suitors, females have little choice over who to mate with.” Here’s why these weird frogs suddenly turn blue
For a short spell in spring, these male amphibians are suddenly and vividly transformed
Oregon’s biggest city was drowning in crow poop. Then a new predator came to town
As thousands of crows darken the winter skies above Portland, Oregon, it makes sense to mind your step
“We leave footprints that disappear within minutes, not to be made again for 6 months.” How the equinox reveals an underwater world
The equinox reveals an underwater world usually hidden from view, says Kate Bradbury
"It can chew through coconuts with its razor-sharp teeth." 6 weirdest rats in the world, including one deadly enough to kill an elephant...
We see rats in city and country – but elsewhere in the world the rats defy all expectations. Here are some of the biggest, most poisonous, and most surprising species!
How did mink become established in the UK?
Mammal expert Steve Harris answers your wild question.
"The snaring led to the loss of the lower part of her right hindleg. Robbed of her speed and stealth, she is forced to hop." Meet a 3-legged indomitable survivor
Seven years ago, a poacher’s snare robbed a lioness of her leg. Against the odds, she lives on in Kafue National Park, Zambia. Mike Dexter goes in search of her
