During experiments, Mr. Seligman observed that when people realized they were powerless to influence their circumstances, they would become depressed and had difficulty performing even ordinary tasks.

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In 1944, most of the world went to an official gold standard system after various unsuccessful experiments during the 1930s.

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Most people would answer this question with an adamant no, but Milgram conducted a series of obedience experiments during the 1960s that demonstrated surprising results.

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By comparing rates of seed formation during the different phases of the experiments, the researchers have been able to put a figure on cosmic rays' contribution to the process.

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Crews conduct a variety of science experiments and perform station maintenance during their six-month stay on the outpost.

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Experiments at Washington University showed that nocturnal mice slept for 40 minutes during every hour of daylight.

BBC: Bad sleep may predict Alzheimer's, says study

In separate experiments, the two flavonoids were added to lung-cell cultures before, during and after infection with H5N1, and tested on H5N1-infected cells treated with zanamivir (brand name Relenza), an antiviral drug prescribed to flu patients.

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She cited Samuel Taylor Coleridge's "Rime of the Ancient Mariner, " with its frozen polar wastes and specters of "Nightmare Life-in-Death, " which as an 8-year-old child she had heard the poet recite in her father's parlor, and she made several dark allusions to the alchemical experiments of Paracelsus and Cornelius Agrippa, two Medieval figures with whom Percy had become obsessed during his studies at Oxford.

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Since that time, there were experiments with an orange ball in England in 1989, but it did not show up clearly on TV during day-night matches and the experiment was abandoned.

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