Why do some computer gamers invert their Y axis controller, so up means down? Answering that question may provide insights into visual perception and cognition with broad ramifications, including in ...

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 ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Yarilet Perez is an experienced multimedia journalist and fact-checker with a Master of ...