What is the largest mammal in the world?

Explanation

The blue whale (Balaenoptera musculus) is the largest mammal in the world, weighing up to 200 tons and reaching a length of 33 meters. It is also the heaviest animal ever to have lived on Earth. The blue whale has a top speed of around 55 km/h. The female is pregnant for 10–12 months, and a blue whale calf is about 7 meters long at birth. The calf consumes 380–570 liters of milk daily and gains approximately 90 kg per day during the first 7 months.