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.
Gwydion Madawc Williams, Degree in Zoology plus a lot of reading. The Blue whale is the largest living mammal, and thought to be the most bulky animal ever. The African elephant is the largest living land mammal. But many extinct species were bigger. Paraceratherium, a long-legged and long necked relative of the rhinocerous, is often viewed as the largest ever - see Biggest Ever Land Mammal | Paraceratherium.