Reaction wheels are useful things, typically used by satellites to keep themselves oriented the right way up in space. Turning the reaction wheel creates an equal and opposite torque in the spacecraft ...

Ponzi and pyramid schemes both take advantage of unsuspecting individuals by promising extraordinary returns in exchange for their money. With Ponzi schemes, investors give money to a portfolio ...

Aaron Hankin is currently working for Dow Jones MarketWatch. He has 10+ years of professional experience in the financial markets. The U.S. economy seems to be doing fine. Growth, for the most part ...