Ferret sleep: When they completely switch off Ferrets may sleep for 14–18 hours a day, but when awake, they become playful little explorers. Read more
The green iguana’s mysterious third eye The green iguana’s third eye detects changes in light and movement, helping it notice predators from above. Read more
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
