Siamese fighting fish: colours, rivalry and remarkable adaptations The spectacular colours and fin shapes of domestic Siamese fighting fish are the result of generations of selective breeding. Read more
Axolotl neoteny: The secret of the forever young amphibian The axolotl becomes sexually mature while keeping larval features such as external gills and an aquatic lifestyle. Read more
Eight thousand ways to be a lizard: Celebrating World Lizard Day! More than 8,000 lizard species reveal just how many different ways there are to be a lizard – from tiny geckos to giant monitor lizards. Read more