Roland Piquepaille writes "Ohio University physicists have used a simple molecule of chlorophyll taken from spinach to develop a complex nanobiological switch. They used a scanning tunneling microscope (STM) to image chlorophyll-a and then injected it with a single electron to manipulate the molecule into four positions. The researchers say this biological switch might be used in future applications for green energy, technology and medicine. Read more for additional pictures and references about this spinach-based biological switch."

Krishna Dagli writes to mention a C|Net story covering a House of Representatives vote on restricting access to social sites on public terminals. The bill, which passed the House in a 410-15 vote, would bar users from accessing sites like Amazon, MySpace, or Slashdot from terminals in libraries and schools. Adults would be able to 'ask permission' to access such sites. From the article: "'Social networking sites, best known by the popular examples of MySpace, Friendster and Facebook, have literally exploded in popularity in just a few short years,' said Rep. Mike Fitzpatrick, a Pennsylvania Republican and one of DOPA's original sponsors. Now, he added, those Web sites 'have become a haven for online sexual predators who have made these corners of the Web their own virtual hunting ground.'"