Prosecutors showed surveillance camera video taken inside the theater complex that they said shows Holmes -- dressed in dark trousers, a light-colored shirt with a T-shirt underneath and a ski cap covering his hair -- using a cell phone at a ticket kiosk.
Lastly, the week saw the unveiling of the world's first fiber-optic solar cell, which is thinner than the width of a human hair and could pave the way to creating energy-producing clothes.