Writer and evolutionary theorist Elaine Morgan starts her TED talk by describing the ongoing paradigm: Chimps stayed in the trees and humans hit the savannas. She argues that humans are just too different than the chimps to justify the ongoing paradigm--for instance, look at our naked (hairless) skin and bipedality. We didn't evolve on savanna. Something else must of happened. She explains that there is a close connection between all of the naked animal species and water. Water life could also explain bipedality. Consider our distinctive layer of fat, which can't be found in other primate species. Again, life in water would explain that layer in us (just like it explains that fat layer in whales). Consider also our speech. How is it that we can speak so well? Only the diving animals and diving birds have such incredible control of their breathing. Morgan argues that it's time to destroy the ongoing paradigm and declare that humans evolved in the water. According to Morgan, almost everybody likes the aquatic theory but almost everyone officially declares that it's "rubbish." But this is one of those cases where everyone could be wrong. She mentions David Attenborough and Daniel Dennett as recent converts to the aquatic ape theory. [Note: some scholars have given detailed criticism of the aquatic ape hypothesis. For instance, see this entry at Wikipedia].