Heather E. Heying is an American evolutionary biologist, former professor, and author, who came to national attention following the Evergreen State College protests in 2017. She has been associated with the informal group known as the intellectual dark web and testified at the US Department of Justice forum on Free Speech on College Campuses in 2018. Heying is also known for her opposition to COVID-19 vaccines and her discredited belief that the drug ivermectin is effective in treating the disease.