Check out some of Greenberg's sand grain photos below and see more microscope photos, including close-up images of food and flower petals, at his website Sandgrains.com. The tip of a spiral shell ...

What would an extreme close-up of your sandwich filling look like? What about your hair? The cluster of dust in the corner of your living room? The grain of pollen stuck to your coat? Scientists ...

At the heart of the Ukraine grain export deal is a complex inspection process involving Turkey and the U.N. NPR recently joined a team of inspectors aboard a ship carrying grain in the Marmara sea.