When I was in middle school, I had a classmate who would look at trigonometric functions and yell, "I will never need these!" ...

December 28, 2025 • On this week’s In Black America, producer and host John L. Hanson, Jr. presents a tribute to the late John Hope Franklin, a noted scholar of African American history, whose career ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Pete Rathburn is a copy editor and ...

Black mucus can happen when you've been breathing in harmful particles from smoke or pollution. Some fungal infections can cause black mucus; these need medical attention. People with lung diseases ...