Indicator species are living organisms that tell us that something has changed or is going to change in their environment. They can be easily observed, and studying them is considered a cost-effective ...

Rachel Hanley is a contributing writer for Investopedia with over six years of experience developing content for financial professionals, institutions, and marketing agencies. Suzanne is a content ...

Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...