There are more than 7,000 languages spoken in the world today. How did human language first develop and where did all those different languages come from? How are they all different? How are they similar? What happens when they die? What happens when a language like Spanish comes into contact with other varieties? This course will explore linguistic diversity and historical change through the lens of evolutionary biology. Using examples from Spanish and recent scientific evidence, we will learn how language can be metaphorically characterized as a living, growing, changing organism.