15 Most Disturbing Experiments in Human History

2. The Tuskegee Experiment

In 1932, the Public Health Service — working with the Tuskegee Institute — began a poorly conceived attempt to study syphilis in black men. These guys drafted 600 black men (399 with syphilis, 201 without), and then studied the long term effects of the disease. What’s worse, they knowingly withheld both the diagnosis and the medication that would heal these men for more than 40 years.