Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Thomas J. Brock is a CFA and CPA with more ...

Tutor Doctor provides in-home and online tutoring services. Since its founding in 2000, it has provided customized academic support across various grade levels and subjects. Tutor Doctor uses ...

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 ...

Researchers from the Center for Paleogenetics have managed to analyze the genome from a 14,400-year-old woolly rhinoceros, recovered from a tissue sample found preserved inside the stomach of an ...