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 ...

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 ...

Beloved in Finland, Helene Schjerfbeck is just becoming hot in Manhattan, where a show of paintings at the Met Museum is likely to leave you awe-struck. By Deborah Solomon As church bells chime and ...