People often think of all whales as giants of the sea when in fact they vary in size dramatically, from the 30-meter blue whale to the two-meter dwarf sperm whale. However, almost all of the largest family by size, the baleen whales, are massive—and scientists have only recently understood how they grew so big. People often think of all whales as giants of the sea when in fact they vary in size dramatically, from the 30-meter blue whale to the two-meter dwarf sperm whale. However, almost all of the largest family by size, the baleen whales, are massive—and scientists have only recently understood how they grew so big. Plants & Animals Phys.org – latest science and technology news stories