Clay Halton was a Business Editor at Investopedia and has been working in the finance publishing field for more than five years. He also writes and edits personal finance content, with a focus on ...

Innate immunity has a long phylogenetic history, encompassing species as diverse as sea anemones, insects and mammals. By contrast, adaptive immunity, which involves lymphocyte-like cells and the ...

Adaptive optics is a branch of optics and photonics that uses light-controlling components to actively correct distortion in an incoming image. These distortions can occur when light from an ...

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®, ...