It will examine the chemical make-up of more than a million stars up to 20, 000 light years away.

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It is therefore less sensitive to the precise chemical make-up of the site.

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One answer, he thinks, is to change the chemical make-up of trading floors by hiring more older men and, especially, women.

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But this theory predicts Earth and its satellite should have a quite different chemical make-up - and the data shows in fact they are very similar.

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As well as helping to identify Martian meteorites, the analysis of these samples, whose composition is known beforehand, will also provide clues as to how the process of re-entry affects a meteorite's chemical make-up.

ECONOMIST: Meteorites

Jonathan Vennerstrom, a researcher at the University of Nebraska, has come up with a five-step chemical process to make compounds that can mimic the action of artemisinin derivatives.

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He added that the exact chemical make up of the herbal extract and its effects on the gullet were unclear, and that the anti-acid drug used was one of the least effective available to doctors.

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