How One NASA Satellite Has Changed How We See Earth In The 21st Century

In December 1999, NASA launched Terra, the flagship satellite of the Earth Observing System, outfitted with a whole rig of sophisticated instruments for collecting data on our planet.
Terra was meant to last six years when launched. A decade and a half later, it's still alive and kicking. In 15 years, the Earth Observing System has collected some amazing data, enabling some fascinating images and visualizations of the Earth - and how humans impact it.