Bacteria and viruses are behind most of the diseases we get hit by. It's nothing personal, it's just what they've got to do to survive. Viruses are simple creatures. So simple they don't eat, drink or ...

Welcome to the ME 270 course website for the Spring 2026 term. The material on this site is a complement to the lecture book for the course. And, all material here is accessible without the need to ...

Learn the benefits and risks of options and how to start trading options Lucas Downey is the co-founder of MoneyFlows, and an Investopedia Academy instructor. Samantha (Sam) Silberstein, CFP®, CSLP®, ...

From attraction to action, sexual behavior takes many forms. As pioneering sex researcher Alfred Kinsey put it, the only universal in human sexuality is variability itself. Human interest in sex can ...

Memory is the faculty by which the brain encodes, stores, and retrieves information. It is a record of experience that guides future action. Memory encompasses the facts and experiential details that ...

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 ...

Are you thinking about investing for the first time? Our guide takes you through the 10 things you need to know about investing, including what and where to buy, and ...