Youth and the Power of Street Democracy
Activist Mary DeMocker on the strengths of art, community and youth.
Understanding sea-level rise
NASA keeps track of sea level change and its causes.
The 100 Year Time-Lapse Project
In 1909 a balloonist photographed the Mer de Glace in the Alps from the air, creating a uniquely detailed visual record of the glacier. A century later two photographers recreated his flight to measure glacial recession during the 20 th century. The results are striking.