Its remorselessly shrill tone, alternating between the shocking and the motivational (not a word Mr Peters likes but accurate, nonetheless), could easily cause a normal brain to explode after half an hour's continuous exposure.

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After exposing men to 'wet heat' for 30 minutes on alternating days, researchers found a temporary decline in sperm production but did not look at sperm quality before and after the study.

BBC: Last Updated: Monday, 5 March 2007, 11:20 GMT

While not always immediately apparent how, you can easily make alterations to the object, including alternating nozzles to switch up its color for dual extruders.

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Although they have not been found to cause any harm, the cables on conventional pylons, which transmit a three-phase alternating current, generate a strong electric field and a continuous buzz of low-frequency radio waves.

ECONOMIST: Monitor