Black rats are originally from India and brown rats are originally from China.
How and why animals develop as male or female is far more complex than we ever imagined.
Understanding happiness in chickens could tell us how to improve their housing.
Evolutionary quirks found in the animal kingdom protect against common diseases.
Cats and humans have different ways of communicating and sometimes that can lead to problems.
Seeing wild animals can be the highlight of a holiday, and help pay for conservation efforts too, but we have to respect the animals.
Emperor penguins have a few hidden tricks to stay warm, like blood vessels in the nose arranged so they can regain most of the heat that would be lost by breathing.
New research has found that different types of habitat loss can change the stability of whole plant and animal communities.
New research suggests that even ecologically flexible baboons could be at significant risk of habitat loss and endangerment from anthropogenic climate change.
Different councils and different rescue organisations can have different rules about how long they can keep animals.
Examining 302 police reports in Detroit, a new study shows that animal cruelty is tightly connected to human relationships.
Pets, like guinea pigs, lead very different lives to humans – and that's why they need very different eyes, too.
New species are being discovered all the time, which only adds to the problem of knowing how many there are on the planet today. It also helps to know what we mean by species.
Rather than prioritizing human beings at the pinnacle of the animal kingdom, Leonardo revered all living beings. When he compared people and animals, it's the animals that often came out on top.
Whiskers are not just ordinary hairs. They are thicker and go deeper into the tiger's skin and send messages to its brain about what is happening in the world around it.
Can animals find the beat in music and dance along?
Revealed: spotted hyaena are actually excellent hunters in their own right.
Animal cruelty investigators do challenging and unappreciated work for very low pay, and normally without union benefits or protections.
Recognising animals as sentient means welfare laws must consider animals' feelings as well as their physical conditions.
Cats and dogs in the UK eat billions of tonnes of meat every year, but insect pet food could change this.