How Whales Became the Biggest Animals on the Planet by NICHOLAS ST. FLEUR

By NICHOLAS ST. FLEUR Species like the blue whale became so big only in the past 4.5 million years, a result of changes to the food supply in the oceans, scientists say. Published: May 23, 2017 at 08:00PM from NYT Science http://nyti.ms/2qPd8MV