Quick-change trick allows a digital camera to photograph blood concealed by paint
Scientists find a surprise in the lens of a fish that lives in the dark
Invisibility cloaks and other new materials that play with light are in the works
Barreleye peers out at the world like a fighter pilot does through a windshield
Millions of stars are mysteriously racing toward one point in the sky
Special lenses that automatically focus can help people wearing eyeglasses see more clearly.