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.
Quetzalcoatlus northropi was the largest animal ever to fly. With a wingspan reaching almost 40 feet, this giant pterosaur was the size of a giraffe when grounded. Most pterosaurs had to content themselves with eating small fish, bugs, or carrion, but Quetzalcoatlus may