lower1. 1  to cause to descend; let or put down: to lower a flag. 2  to make lower in height or level: to lower the water in a canal. 3  to reduce in amount, price, degree, force, etc. 4  to make less loud: Please lower your voice.
Most people believe that the largest animals to ever exist on Earth were the dinosaurs. However, one of the largest land dinosaurs, the sauropod Argentinosaurus, weighed only about 180,000 pounds (81,647 kg). That's little more than half the size of an adult blue whale. It makes a lot of sense that the world's largest animal would be a sea creature. Land animals have to support their own weight, whereas sea creatures get some help from the water. It is believed that at one time there were more than 200,000 blue whales.
The Life of Mammals. The anatomy of the largest mammal ever to have existed. Everyone has heard of the blue whale, yet they are rarely seen and not often filmed. Sir David's delight at the privileged close up view of one of these ocean giants as it breached right beside him is evident. Although difficult to comprehend, at 30 metres in length and 180 metric tons or more in weight, the blue whale is the largest animal ever known to have existed.