This is when unrelated species evolve to have functionally similar features. All bats and birds "converged" with their ability to fly in response to environmental stimuli and biological goals. The arm ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Eric's career includes extensive work in ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Amy Soricelli has over 40 years working with job candidates and has honed the art of the job ...