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
Green tree python color change The green tree python may be yellow or reddish-brown as a juvenile, developing its characteristic green color later in life. 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
