Filter material: layer of fine gravel used in slope stabilization structures that allows water to escape and retains soil particles.

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The filter material developed by Nikolaidis and his colleagues, with funding from the Critical Technologies Program and industry, has at least a 20-year life span.

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The group is supported by many of the world's largest internet companies who rely on it to filter unwanted material.

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Although it is coy about details, the company says it will use software to filter out objectionable material and human reviewers to decide borderline cases.

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The material to be tested is liquefied and passed through a filter made up of glass beads which are coated with the antibodies.

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Edwards also bought a company called Embrella, which makes a filter that can be placed in the aorta in order to catch material.

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