An extreme test of such moral sympathy was the case of Mary Bell, who was convicted in 1968, when she was just 11, of murdering two little boys in Newcastle.

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Again, this is mainly an issue for spinners, the most extreme example being Test cricket's all-time highest wicket taker, Muttiah Muralitharan.

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Though Einstein's framework remains intact so far, "the study is significant for the way observations by astronomers are helping to identify new, extreme cases" to test his general theory of gravity, said Dr. Wang.

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Still, the scientists were worried that somebody might go to extreme lengths to stop the test.

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Intensive-care medicine has become the art of managing extreme complexity and a test of whether such complexity can, in fact, be humanly mastered.

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Test the idea at one extreme: would this apply to non-payment of a parking fine, say?

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Equally important are the engineering practices of Extreme Programming (XP), particularly test-driven development, simplicity of design, pair programming and re-factoring (upgrading and simplifying) software code.

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Extreme adventurists travel to Ouray, Colorado, from all over the world to test their strength, skill and stamina on the vertical walls of ice.

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The gravitational field between the two black holes was so strong that it had never been possible to test Albert Einstein's theory of General Relativity in such an extreme situation.

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