Nanotechnology

Christopher D. Horn referred me to six pointed stars each made from six yellow triangles, which appear on a photo that accompanies an article titled: As Nanotechnology Goes Mainstream, 'Toxic Socks' Raise Concerns; Unknown Risks From Nanosilver Cited

Caption under the photo:

A biosensor made from an array of silver nanoparticles deposited on glass. (Credit: Courtesy of the National Science Foundation).