David Tipling / Bearded vulture (Gypaetus barbatus) adult swallowing leg bone along with hoof, Spanish Pyrenees, July. This bird swallowed five of these leg bones whole, they have the ability to dissolve the bone in...

David Tipling / Bearded vulture (Gypaetus barbatus) adult with leg bone, Spanish Pyrenees, July. This bird swallowed five of these leg bones whole, they have the ability to dissolve the bone in their stomachs within...

David Tipling / Bearded vulture (Gypaetus barbatus) adult swallowing leg bone along with hoof, Spanish Pyrenees, July. This bird swallowed five of these leg bones whole, they have the ability to dissolve the bone in...

Tony Wu / Frequent and repeated defecation by Siberian flying squirrel (Pteromys volans orii) in favored locations results in accumulated droppings. As winter snow melts, embedded droppings dissolve, dripping d...

SCOTLAND: The Big Picture / Magpie inkcap (Coprinopsis picacea) toadstool cap deliquescing as it reaches maturity, close up, Scotland, UK. October.