Ancient climates . More on global warming . Melting ice in Antarctica . Beaches erode .
Diseases arise .
A foraminifera called Quinqueloculina impressa The dark brown structure is the microscopic foram's shell. Radiating from the opening are fine, hairlike reticulopodia, which the foram uses to find and capture food. A piece of drill core taken from sediment nearly 1000 meters, or about half a mile, below the ocean floor. Courtesy Ocean Drilling Program . The photo was taken from the north, looking across the arid sub-Sahara and Sahel.