We know that lots of animals, maybe all animals, sleep. Cats, dogs, even worms and jellyfish sleep. But we still don’t know exactly why they started sleeping.
Marcella Cheng/The Conversation
Pond snails use things like rocks or the side of their aquarium as their bed, attaching themselves while they sleep. This might not seem very relaxing but their shells do hang away from their body.
Waluh, a one-day-old male baby pygmy hippopotamus (Cheropsis libereensis), swims with his mother.
Why are some animals resistant to waterborne disease? A reader wants to know.
aleks1949 / shutterstock
In defence of 'cryptozoologists': we have a lot to learn from their curiosity and sense of wonder.
Bonobo fishing for termites with a stick.
Species that use tools aren’t necessarily better at solving problems than species that don’t.
Newly recognised genetic populations carry their evolutionary history with them, and the history of their habits. This is why detecting new species is so important.
Believe it or not, cats are really useful. Even this one.
Fischer et al
Scientists have discovered two new types of ants in the rainforests of New Guinea thanks to an advanced X-ray imaging technique.
Smithsonian's National Zoo/flickr
Our planet's huge range of environments has led some animals to evolve some bizarre but very useful features.
belizar / shutterstock
The best modern zoos focus on conservation, education and research – not entertainment.
Your beak’s in my ear, darling.
Animals can be remarkably reminiscent of humans when it comes to relationships – changing behaviour, eating habits and even friends for the sake of their mates.
How do you do?
International Fund for Animal Welfare Animal Rescue/flickr
Chimps might be cute and cuddly but it's their human drama that obsesses us.
You couldn’t just plop dinosaurs anywhere and expect them to survive.
A "Pleistocene Park" might be a more realistic scenario.
I want to break free.
Center for Great Apes
The experience of visiting a zoo is about to change dramatically. The Next Generation Zoo concept is based on how animals use space in the wild, giving them more freedom and better using the resources…
X-ray imaging of tiny frogs’ bodies show that their big mouths resonate best around the frequency of the male’s calls - meaning…
It seems Architeuthis dux is the only species of giant squid.
As many as 21 species of giant squid live and die under the surface of our oceans. At least, that’s what we thought. A paper published today by my colleagues and I in Proceedings of the Royal Society B…
Catching prey such as mosquitoes would be pretty hard if you couldn’t focus your vision.
A study released today in Nature shines some light on why bats produce high frequency calls – and why some squeak far higher than others. Over the last four years I have been researching bats by monitoring…
Female wasp spiders often eat their mate straight after intercourse.
When it comes to selecting a mate, females are traditionally thought of as the choosy sex; males, meanwhile, aren’t thought to be particularly picky. This makes sense for many species – the sex that invests…
Exposure to warmer water can greatly increase the reproductive powers of the common pest fish gambusia, a new study shows…
Groups of allied male dolphins in Western Australia’s Shark Bay form shifting, overlapping social networks unlike anything…
Pulses of steroid hormones are responsible for differentiating an insect’s lifecycle metamorphoses, researchers at Washington…