NASA astronaut Don Pettit captured two amazing videos of the auroras from his unique perch above Earth last week.

In the waters off Iwo Jima, a volcanic island in Japan’s Satsuma archipelago, the sea has a distinct green tint. It’s not ...

Nearly three-fourths of Earth is covered by oceans, making the planet look like a pale blue dot from space. But Japanese ...

Advocates say all that green industries need is a little help ... that investment in green technology is a good move for the Earth and economies alike.

In fact, there may have been a time when they weren’t blue at all. According to researchers at Japan’s Nagoya University, Earth’s earliest oceans glimmered with green hues for over 2 billion ...