However, the candidates will have already been sieved at the party primaries and their natural first choices might be missing from the ballot papers.

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The sand will be severely shaken and sieved to make sure only fine-grained material, less than the width of a human hair in diameter, reaches the instruments.

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In planned subsequent steps, the sample will be was sieved, and portions of it delivered to the Chemistry and Mineralogy instrument and the Sample Analysis at Mars instrument.

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Many patient taxonomists from several European countries and America then sieved through litres of muddy gravel with microscopes and pairs of tweezers to see what treasures had been captured.

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From CHIMRA, the samples will be sieved and delivered to two different instruments: the Chemistry and Mineralogy ( CheMin) instrument and the Sample Analysis at Mars ( SAM) instrument.

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Two days earlier, it had scooped some sand from a drift, sieved it to a fineness of less than a hundred and fifty microns, and dropped a portion half the size of a baby aspirin into a funnel on its back.

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