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"A father's input often ends at copulation, so males must impress females." Why males are such show-offs
Same species, completely different packages. From striking color differences to unseen behavioral traits, male and female animals are often worlds apart. But what is the evolutionary engine driving sexual dimorphism?
The first ever penis appeared 425 million years ago – and it wasn't small. So why did evolution make some animals’ so ridiculously large?
Its body might have been no bigger than a grain of rice, but the owner of the oldest-known penis was remarkably well-endowed…
"What sets it apart from the rest is that it doesn't just breathe through its anus - it eats through it, too." Meet the world's most amazing arse
This has to be the world's most weirdest bottom, says Stuart Blackman
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Researchers shined UV light on this 125-million-year-old crocodile. What they found is fascinating
New research provides key information about the early evolution of a group of reptiles known as crocodylomorphs.
"The uninvited guest sinks its syringe-like mouthparts into the meaty organ and begins draining it of blood." Discover the gruesome tongue-eating parasite
What’s grosser than gross? A parasite that eats your tongue – and then lives in your mouth, as your tongue. Meet the nightmarish Cymothoa exigua.
"What's the biggest parasite on the planet? It's not as gruesome as you may think…
We may think of parasites being small and microscopic, but they're not all like that... Meet the world's biggest parasites
Whales need fresh water to survive. Here’s how they get it in the salty ocean
How do whales take in enough fresh water while in the sea?
What's the most dangerous, deadliest animal in Australia?
Just how deadly is Australia's wildlife? We take a look
Sharks have a deadly secret sixth – and possibly – seventh sense to locate prey — and it’s more terrifying than you think
The surprisingly lethal way sharks can find and hunt their prey
Humpback whales are some of the ocean’s loudest creatures – so why do they sometimes ‘whisper’?
Scientists have been listening to newborn humpback whales and their mothers.
It looks like a pet husky – but this wild predator is built to survive the coldest conditions on Earth and dives headfirst into the snow to hunt
Amongst the most beloved of all Arctic animals is the adorable, yet tenacious Arctic fox. Here's all you need to know about the beautiful and mesmerising canine.
When scientists sent a robot into the deep ocean over 20 years ago, they found something never seen before – a gruesome discovery that led to a bizarre revelation
Whales were once hunted to the brink of extinction – what happened when the world called a halt to commercial whaling?
A moratorium on commercial whaling was introduced, and widely implemented, in the 1980s in a bid to stop the decline in whale populations – but did it work?
Deadly predators, colossal giants and animals visible from space: 20 ocean record breakers that will boggle your mind
Dive into the extreme, record-breaking wonders hidden beneath the waves
“I watch as a hissing, jostling scrum tear into the remains of a zebra foal”
Raptors have declined across Africa, but a new effort to safeguard them is underway
"If it were human-sized, its speed would equate to 800kmph – faster than a speeding bullet"
Did you know the fastest insect runs at 2.5m per second? Pretty impressive says David Butvill
"They have some of the deadliest venom in the world, which can cause paralysis, including of the diaphragm, potentially leading to respiratory failure."
All you ever needed to know about the much-feared sea snake
Do fish actually sleep?
Wondering if fish sleep? It's not a simple yes or no answer says Stuart Blackman after weighing up the evidence
"To survive it consumes a large portion of its internal organs, including its kidneys, liver, gizzard and intestine"
Great white shark attacks 'ghost dolphin' in Brazil. A predation event like this has never been recorded here before
Scientists find evidence of a white shark predating a rare Franciscana dolphin in southern Brazil for the first time.
"It gnaws off its bony remains and eats them." 10 animals that eat their own body parts
Discover 10 bizarre animals that – rather grossly – eat their own body parts
East Antarctica recently gained almost 700 billion tonnes of ice – and scientists know why
What happens in Antarctica can influence the whole planet, so scientists keep a close eye on environmental changes.
Wasp spider found in North West England for the first time
The brightly coloured spider is an exciting find, but its presence in the north of England highlights a wider problem.
What on Earth are tentacles, how do they work – and why do animals have them?
All you need to know about tentacles
