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Science - Graphene is a two-dimensional lattice allotrope of carbon. It was rediscovered, isolated and characterised in 2004 by Andre Geim and Konstantin Novoselov at the University of Manchester. They won the 2010 Nobel Prize for their work.
Science - Carbon-carbon covalent bonding
Science - Carbon tetrahedral bonding structure in diamond
Science - Electron shell structure of the gold atom
Science - The Hermann Grid an optical illusion characterized by "ghostlike" grey blobs perceived at the intersections of a white (or light-colored) grid on a black background. The grey blobs disappear when looking directly at an intersection.
Science - The Lingelbach effect, or scintillating grid illusion, is an optical illusion similar to the Hermann Grid. It is constructed by superimposing white discs on the intersections of orthogonal gray bars on a black background. Dark dots seem to appear and disappear rapidly at random intersections, hence the label "scintillating". When a person keeps his or her eyes directly on a single intersection, the dark dot does not appear. The dark dots disappear if one is too close to or too far from the image.

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