Most animal groups adopted their shapes quickly but some kept evolving.
Strange frond-like sea creatures are among the planet's earliest animals, but new research dates them and the entire animal kingdom to much earlier than first thought.
Many dog owners have tales of their faithful companion licking away their tears. Researchers investigated whether, beyond being comforting, canines would actually take action to help an upset owner.
A vegan and anti-speciesist society is based on a somewhat simplistic view of the animal world. And its principles cannot be implemented in a globalised world.
Based on his age in 'dog years,' could your animal pal legally buy alcohol? Or would he be cashing in on his senior discount? Veterinarians are more interested in life stage than a particular number.
Would you pay to see rhinos in Australia's savannas or forests? It's not as crazy as it sounds – and could help save collapsing rhino populations.
Social farms provide health, social and educational care to disadvantaged young people.
Both male and female birds sing to impress other birds, but as well as that, they do it for pleasure!
Sea turtles contend with a contagious disease that causes debilitating tumors. Genetic analysis is helping researchers figure out precision medicine-based treatments for the turtles.
For roboticists looking to nature for inspiration on how animals see the world, there's a tension between mimicking biology and capitalising on the advances in camera technology.
The Earth is losing more and more biodiversity every day, and we should all be worried
Everybody does it, but why? Scientists aren't really sure if exhaustion, stress or some other social factor is at the root of yawning – and how it can be so contagious.
It's becoming harder and harder for animals to find human-free spaces on the planet. New research suggests that to try to avoid people, mammals are shifting activity from the day to the nighttime.
In Asia, human hair is sold and recycled into products, but in the West it is treated with either disgust or veneration. A new exhibition explores our bizarre attitudes to hair.
Boston Dynamic's robots are inspired by nature for good reason.
Dehumanizing insults have become more common in political discourse. Psychology research has shown that they can prime us for violence – and even change our brains.
Here are ten common misconceptions about what dogs need and how they communicate with us. Plus, a gallery of reader and staff dog pictures!
More than half of vets consider a change of job, despite considerable financial, emotional and intellectual investment.
In choosing not to ban the live export trade even in the hottest northern months, the federal government is allowing animals to be put in conditions where they cannot possibly escape suffering.
Here's some advice on taking selfies with wild animals: don't. It's not fun for the animal, and can have serious knock-on effects for their health. And you could be injured (or worse).