mean sea level

The Surprisingly Difficult Task of Measuring Sea-Level Rise Around India

This image of the asteroid Vesta, calculated from a shape model, shows a tilted view of the topography of the south polar region. The image has a resolution of about 1,000 feet (300 meters) per pixel, and the vertical scale is 1.5 times that of the horizontal scale. Caption & credit: NASA/JPL-Caltech/UCLA/MPS/DLR/IDA/PSI

Alien Mountains Stand Tall on the Shoulders of Still Waters