The researchers imagine a range of uses for their latest, greatest and entirely sustainable transparent wood, including smart windows, wood with built-in lighting functions and wood for heat ...

There are very special cases, when the sky is very clear and exceptionally transparent, that a green flash can be glimpsed just as the very topmost part of the sun is rising or setting.

With Monday's 43rd celebration of Earth Day, the msnbc logo turned green to inspire individuals and organizations to demonstrate their commitment to environment ...