Nicola Davis explores Proto-Indo-European, the hypothetical common ancestor of modern Indo-European languages and asks, where did it come from? How and why did it spread? And do languages evolve like genes?
Swedish, Ukranian, Punjabi, and Italian. To many of us, these languages are as different and distinct as they come. But in the same way that dogs, sheep and pandas have a common ancestor, languages can also be traced back to a common tongue, linguists say.