For example, the pair found cells sensitive to slanted eyebrows, which could be relevant in recognising anger.

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At the start of chemotherapy, tumour cells are sensitive to the various chemicals designed to rein them in and kill them off.

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After several attempts, the researchers found a level which "inactivates both viruses and bacteria while leaving sensitive materials such as mammalian cells unharmed".

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They have specialised cells that are vibrationally sensitive in their trunks.

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Prostate cells, including cancerous ones, are sensitive to levels of certain male hormones, and can be rendered far less active if levels are reduced.

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The technique begins with the placing of light-sensitive proteins from green algae inside specific types of brain cells.

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The viruses used to deliver the light-sensitive proteins can be engineered to target very specific clusters of brain cells.

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The scientists learned that by blocking FGF1 in ovarian cancer cells resistant to platinum drugs, they were able to make them sensitive to chemotherapy again.

BBC: Dundee researchers find chemotherapy efficacy gene

ImmunoFlow is so sensitive it can detect Salmonella, Listeria and E. coli O157 - even when there are only 100 cells per millilitre.

BBC: Rapid food poisoning analysis