Laden has taught at multiple institutions, including, but not limited to, Harvard, the University of Minnesota, and Century College. In 1999, when he was on the faculty of the University of Minnesota, he co-authored a study in Current Anthropology that found that the practice of humans cooking food evolved because it allowed them to cook vegetables. He published a blog, "Greg Laden's Blog", on ScienceBlogs, where he focused on public controversies regarding multiple scientific topics, including global warming and evolution.
