Earth | Nature | Ocean on Instagram: "The Bearded Vulture has one of the most extreme digestive systems in the animal kingdom. Unlike other birds, it survives almost entirely on bones. Large bones are lifted high into the air and dropped onto rocks until they shatter, exposing the nutritious marrow inside. Smaller bones are swallowed whole. What makes this possible is its incredibly acidic stomach - with a pH close to 1, similar to battery acid. This powerful environment dissolves calcium comple