HISTORIANS of mathematics attribute the first use of the cross x as a symbol for multiplication to William Oughtred (“Clavis Mathematicae”, London, 1631). See W. W. R. Ball's “Short Account of the ...

In many submerged regions, murky mud shelters strange life-forms that seem to be the key to one of the biggest mysteries of life on Earth. These creatures belong to a domain of life called the archaea ...

The Chicago Manual of Style is an American English style guide published by the University of Chicago Press. The Manual’s guidelines for publishing, style and usage, and citations and indexes—known as ...

Sean Ross is a strategic adviser at 1031x.com, Investopedia contributor, and the founder and manager of Free Lances Ltd. Robert Kelly is managing director of XTS Energy LLC, and has more than three ...

Lucas Downey is the co-founder of MoneyFlows, and an Investopedia Academy instructor. Dr. JeFreda R. Brown is a financial consultant, Certified Financial Education Instructor, and researcher who has ...

Management knows it and so does Wall Street: The year-to-year viability of a company depends on its ability to innovate. Given today’s market expectations, global competitive pressures, and the extent ...

The Matrix collection depicts a complex science fiction story incorporating many philosophical elements. Written and directed by the Wachowskis and produced by Joel Silver.