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.
Biggest Whale-Basilosaurus (60 Tons). Basilosaurus (Nobu Tamura). Unlike the other mammals on this list, Basilosaurus can't lay claim to being the largest-ever of its breed--that honor belongs to the still-extant Blue Whale, which can grow to as much as 200 tons.
Blue whale is not only the largest mammal on earth â¦, but the largest animal of any kind on the earth. Better still, the blue whale, is the largest animal to ever exist on the earth. There are no land mammals that would make the list of the ten largest mammals on earth. But the largest land mammal is the African elephant. But even the mighty elephant is relatively tiny in comparison to the larger species of whales.