Scientists are intensively tracking the workings of planet Earth with satellites that chart its winds, ocean currents, temperatures, and more. With a new virtual Earth, converted into physical equations, they are revealing its workings in whole new ways.
An intimate tour of Earth's most impressive landscapes as captured by astronauts. Dr. Justin Wilkinson from NASA's astronaut team describes the special places that spacemen focus on whenever they get a moment.
We fly along over Earth's luminous nocturnal landscapes, with Dr. Justin Wilkinson as our guide. This intimate tour takes us over cities and coastlines in the Americas, the Middle East and Europe.
Did liquid water once flow on Mars? Did the planet support life in any form? The answers may shed light on whether life-bearing planets are the norm in our galaxy run. Or is it a rare gem, with a unique make-up and history that allows it to support life.