From the monetary side, the Federal Reserve used its normal stimulus tool of cutting interest rates, and when even drastic cuts had no impact, it launched what it admitted was an untried experiment, so-called quantitative easing, in an effort to do its part in helping to lift the economy out of the worst recession in 80 years.

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In the 19th century it was commonplace to do an experiment simply to see what would happen.

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The students, aged from seven to 24, were asked to develop an experiment to test anything humans may "want to take or do on Mars in the future".

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He is running an experiment, called the Personal Genome Project, in which other people are encouraged to do so, too.

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In an experiment that bears watching, the Directorate of Intelligence (DI) and the DO have begun to co-locate their personnel.

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