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Wendy M. Grossman, a frequent contributor on information technology, is based in London.

More by Wendy M. Grossman
大眾科學 Magazine Vol 288 Issue 3This article was originally published with the title “Connect the Pings” in 大眾科學 Magazine Vol. 288 No. 3 ()
doi:10.1038/scientificamerican032003-7qn3KqIaBgBHU2VUgSGA2U
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