The Piltdown Man is one of the world’s most infamous instances of scientific fraud, and it derailed the study of evolution for decades. How exactly did scientists in 1912 fall so completely for a hoax?
After a bombing attack on his home, Attorney General Palmer launched a series of raids on perceived threats to national security. Thousands of people were rounded up, many without cause or warrant, and kept in horrifying conditions.
After WWI, there was a great deal of social unrest in the United States. Additionally, there was a fear that Communist revolutionaries would try to take over the country. Adding fuel to the fear were two bomb plots in 1919.
Wallace was one of the most prominent voices against the Civil Rights Movement and its objectives. He spent multiple campaigns for both governor and president on an explicitly pro-segregation platform.
People are often surprised to learn that the namesake for the James Webb Space Telescope wasn't a scientist or engineer, but a lawyer and a bureaucrat. He was NASA's second administrator, and led the agency through incredibly difficult times.
For parts of the 20th century, the U.S. and Mexico had agreements in place allowing, and even encouraging, Mexican nationals to enter the U.S. to perform agricultural work and other labor in the American Southwest.