MinervaBMJ 2007; 335 doi: http://dx.doi.org/10.1136/bmj.39412.563426.471 (Published 29 November 2007) Cite this as: BMJ 2007;335:1162
About 1.6 billion mobile phones are in use throughout the world. Along with concerns about exposure to the electromagnetic fields emitted by mobile phone networks are fears that hearing may be damaged by using mobile phones. Thirty young and healthy volunteers with normal hearing had their auditory brainstem responses recorded before and immediately after 10 minutes of genuine or sham exposure to the 900 MHz pulsed electromagnetic field emitted by a commercial mobile phone. The analysis showed no significant differences in the latency of auditory brainstem waves either before or after genuine or sham exposure (BMC Public Health 2007;7:325; doi: 10.1186/1471-2458-7-325).
Sociable animals, including humans, need to rapidly recognise friend or enemy within their own species. Now we have evidence that human babies learn how to do this very early in life, before they can talk (Nature 2007;450:557-9; doi: 10.1038/nature06288). Researchers tested babies aged 6-10 months and were amazed to find that they could distinguish between …
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