In 2014 I offered the massive open online course, Human Evolution: Past and Future. One of the most challenging subjects in human origins research is how different kinds of scientists use the concept of species in their work. As I put together the course, I thought about how to convey paleoanthropological views of species, and how they relate to what most people may have learned in their biology education.
I went to Charles Darwin's home at Down House early on a Sunday morning to walk on the famous Sandwalk and think about species.
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