Usage Notes: 1  Plural: organizations. 2  The terms organization and social organization are used interchangeably in a sociological context. 3  Variant form: organisation. 4  Types: 5  association. 6  bureaucracy. 7  coercive organization. 8  formal organization.
15 of the Largest Animals in the World. The blue whale (Balaenoptera musculus) is a marine mammal belonging to the suborder of baleen whales. At 30 metres (98 ft) in length and 180 metric tons (200 short tons) or more in weight, it is the largest known animal to have ever existed.
There are actually two mammals that can lay claim to the title of world's smallest mammal. One of the animals weighs the least of any mammal, while the other is the shortest mammal on Earth. The lightest mammal title goes to the Etruscan shrew (Suncus etruscus), which weighs in at a measly two grams or less.