Psychology Today – Vyv Evans, PhD
“All children are born with the same kind of brain wiring, so at the outset, we are all equally adept at learning any possible human language. For a newborn, any language is, in principle, as easy or as difficult to learn as any other. But from the early teens, due to the loss of neurons in the brain, it becomes more difficult to acquire a new language with native-like competence.” (more)