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Mega volcanoes, asteroid impacts and 'the great dying' – 5 deadly mass extinctions that changed life on Earth forever
What is a mass extinction – and how many of them have there been? Will Newton takes a look the 'big five' extinction events
You’ve never seen polar bears like this before: 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
"People risk being attacked, mauled and possibly killed…" The rise and rise of the reckless wildlife tourist
From patting penguins to selfies with bison, are people behaving increasingly foolishly around wildlife? And is education or punishment the answer?
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Goldcrest or firecrest? What's the difference between these two diminutive, cute birds?
Know your goldcrests from your firecrests? Joanna Peaker from The Scottish Wildlife Trust takes a look at some of the differences…
Can you guess which animal this is in less than 12 seconds?
This is a close-up image of an animal – can you guess which one?
"Their teeth are barbed and hollow, and primed with a toxic cocktail strong enough to kill a human. Worst of all they spit out their teeth like poison darts"
You have probably never thought about whether snails and slugs have teeth, but they do...
Divers saw a shark approaching – and were stunned when it did this
Extremely rare footage shows an oceanic whitetip shark breaching in the Maldives.
Scientists tracked these elusive ‘ghost of the forest’ wild cats for over 15 years – here is what they found out
Roaming the rainforests of Sumatra and Borneo, this wild cat is extremely elusive – but scientists have finally managed a glimpse into its life.
Why do captive killer whales have drooping dorsal fins?
Orca in captivity live very different lives from those in the wild, and this can affect their physical features
It has a squidgy nose, sharp quills and a prehensile tail – and this adorable footage shows one shimmying up a tree
Have you ever seen a porcupine climb a tree?
10 sinking islands that could be lost forever…
There are thousands of islands that are threatened by rising sea levels – these are just some of those that could be lost forever
“It was pure chaos!” This diver stumbled across a huge lion's mane jellyfish in Australia
Underwater videographer shares incredible footage of the moment he discovers an enormous lion's mane jellyfish.
"While snorkelling a scientist was dragged underwater and drowned by one of these huge predators…" 8 deadliest animals in the Antarctic Ocean
If you somehow find yourself in the Antarctic Ocean, these are the animals you don't want to cross.
This solar-powered sea slug slurps its lunch like a smoothie then does a headstand. The footage is beyond belief
When these sea slugs feed on algae, they pinch their prey's ability to photosynthesise. Now, scientists have shared remarkably rare footage of them feeding.
"It requires chilly temperatures of 0 ̊C to survive. If exposed to the balmy warmth of 4.4 ̊C, their membranes dissolve and they will melt into goo"
A leftover from the last ice age, ice worms are remarkable creatures that can survive freezing temperatures says Michael Engelhard
These people went out on the reef at night – and found walking sharks in the shallows
Epaulette sharks are famous for using their fins like limbs to help them crawl around the seabed. Now, a new study reveals that coral reefs are important nursery grounds for these curious marine creatures.
"As it touches the seafloor, it kills whatever living thing it contacts by encasing it in a tomb of ice…" Discover the finger of death
Strange and deadly brinicles form polar waters because of the difference between air and sea temperatures
Can animals really be gay?
Humans are definitely not the only species to exhibit same-sex sexual behaviour. But is it the evolutionary conundrum it’s made out to be? Can animals be gay?
"With what seems like suicidal recklessness, she approaches..." Watch this huge spider get its meal stolen
In this clip from the BBC’s The Trials of Life, narrated by David Attenborough, two spiders compete for food – one much smaller than the other, but not less daring.
“We both heard a faint knock. We looked at each other, opened the door and glanced down.”
The coati who came to tea – and now “waltzes in, eats a pear and falls asleep”
Enormous apex predator filmed 430m deep in Pacific Ocean
When deep-sea researchers visited the Marshall Islands, they captured rare footage of bluntnose sixgill sharks – a species that can grow over 5m long.
Can a dinosaur really be mummified? How Earth can soft tissues survive for millions of years?
Did you know, in rare cases, dinosaurs can be mummified? Dr Anjana Khatwa explains
Researchers hid a camera off the coast of South Africa, then a "creepy creature" appeared and attacked this shark
Shark “finds out the hard way” why it shouldn’t mess with this bizarre ocean animal.
Tuna carcass placed at bottom of ocean. All was quiet, before this happened
Eerie deep-sea footage shows a host of strange animals appearing out of the darkness for an easy meal.
