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Elephants have 'conveyor belt’ teeth, dolphins grow theirs in layers like trees, while sharks have a never-ending supply - so why are we stuck with just 2 sets?
From baby teeth to ‘conveyor belt’ molars, here’s why humans—and other mammals –grow and replace their teeth in such fascinatingly different ways
"I was once charged by a musk ox – and they can shift. Fortunately, I could shift faster than the photographer I was with..."
Wildlife photographer Pete Cairns on snow, squirrels and uncooperative eagles
Is nowhere safe? Watch gripping BBC footage of giant, killer fish leaping to snatch baby birds – turning the lagoon into a deadly arena
Giant trevally have incredible brains that can calculate the air speed, altitude and trajectory of a bird, taking its hunt out of the water.
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"They are one of the few animal species who gift for reasons that don’t involve sex." Discover 10 animals that like to give gifts
The moral of this story is… fancy wrapping is all well and good, but never skimp on the present!
The 12 birds of Christmas? Discover the birds hiding in the famous carol and their surprising stories
It’s got doves, hens and, of course, a partridge, but Stephen Moss explores how a much-loved carol may be all about birds, plus why the robin rules Christmas.
10 silliest bird names on the planet – including something pronounced 'ee-EE-vee'
Sun, sand and a deadly paradise for Kenya’s rarest monkeys: Inside the battle to save them before it's too late
Monkeys are overrunning Kenya’s tourist hotspots in the south of the country. Their apparent abundance in Diani, however, is not a straightforward conservation success story
Watch this adorable baby sea otter learning to float on its own. What happened next is heartbreaking...
Wildlife lover Ayse Genisel was delighted to spot a baby sea otter through her binoculars, but people trying to get too close eventually led to tragedy for the pup
Astonishing secrets behind a reindeer's incredible eyesight - and why they will have no trouble finding their way on the snowiest of Christmas Eves
Do your children wonder how Santa's reindeer see in the dark on Christmas Eve? Turns out reindeer vision is perfectly suited to the dark snowy winter nights, as veterinary eye expert Chris Dixon explains.
I woke up to a bear cub pulling at my sleeping bag – and then its mother arrived...
Wildlife photographer Danny Green talks sinking ships and battles for sleeping bags
Nature’s hidden miracle workers: 7 ecosystem engineers quietly transforming the planet
From beavers to parrotfish, ecosystem engineers have a profound impact on their surrounding ecosystem and the other wildlife within it.
It looks like a Christmas tree: Watch this tiny, secretive creature burst into life like an underwater Cinderella
These colourful worms are always in the Christmas spirit, but they’ll vanish inside a coral if you startle them, says Melissa Hobson
"You have to shoot the animal in the shoulder and wait about five minutes for the animal to get groggy and fall over."
a runaway zebra has an unpredicted response to anaesthetic and has to be saved from a tree
"They use rudimentary spears to stab bushbabies while they sleep" 10 lethal predators that kill with weapons and other tools
These hunters don’t just rely on instinct—they use tools to outsmart and overpower prey
"It erupts from its hiding place in a lightning attack and sprints to catch up with and overpower its prey with ruthless efficiency"
Once a phantom of Chile’s windswept peaks, this plucky feline is making a comeback
Millions of these animals all rush to the beach at once causing chaos – here's why they do it...
Sandra Storch explains why turtles choose to take part ion mass nestings
6 amazing blood-sucking animals that aren't insects - including a fish that's reported to have swam up a man's penis
While insects are best-known for feeding on blood, there's actually a few more species that target this protein-rich liquid.
10 animals that can kill an elephant: Which animals are able to take on this majestic giant?
From shrimp that look like candy canes to eels that mimic snowflakes: 6 festive animals named after Christmas
It's not all robins and reindeer – here are 6 festive species that are associated with Christmas
Super predators over 10 metres long once dominated our oceans – unlike anything seen today, say scientists
A team of researchers reconstructed an ancient marine ecosystem – and discovered a previously unseen seventh layer in its food chain
Do all gulls live by the sea?
Watch brutal, heart-stopping BBC footage of two fierce puma mothers fighting in a savage battle for territory in the Andes
In the remote Patagonian highlands, two puma mothers clash violently
Crushing bone, spearing fish, tearing flesh... These are the 6 deadliest bird beaks on the planet and they are highly effective lethal weapons
Discover the strongest, most lethal beaks on Earth.
Watch incredibly cute footage of shy orphaned baby elephant trying to make friends while swimming
The clip was filmed for Apple TV's Born to be Wild, which follows the extraordinary bond between baby animals and humans