A new computational method now makes it possible to calculate the forces between large molecules with unprecedented accuracy.

Pete Rathburn is a copy editor and fact-checker with expertise in economics and personal finance and over twenty years of experience in the classroom. The present value (PV) of a bond is the sum of ...

John Navin is a freelance writer for Investopedia. His stock-trading work was profiled in "The Warren Buffetts Next Door: The World's Greatest Investors You've Never Heard Of." Samantha (Sam) ...