Much of biologist Hannah Stowe's memoir, Move Like Water, records her experiences on sailing vessels researching cetaceans – an entirely aquatic group of mammals that includes whales, dolphins and porpoises. Some interesting trivia regarding these magnificent creatures:
- The fossil record shows the first cetaceans evolved from land-dwelling quadrupeds around 55.8 to 49 million years ago, in the Early Eocene epoch. Their ancestors were deer-like creatures that moved back into the sea, flippers replacing their legs over the eons.
- At up to 32 feet long, the orca (aka killer whale) is the largest member of the oceanic dolphin family. The common bottlenose dolphin, which defines the family for many people, ranges from 8 to 13 feet, and the smallest is the Hector's dolphin, at only 4 feet in length.
- The blue whale is the largest creature ever to have lived on Earth. It can reach up to 100 feet long and weigh 200 tons – as much as 33 elephants. Its heart alone ...