Submissions already include some stunning wildlife photography, including a sleepy lion cub on a dirt road, a mountain goat ...

This colorful image of the Helix nebula may mirror what someday could become of our sun and our home planet. Released on ...

National Geographic is running a challenge for users to submit photos that "celebrate the beauty of the planet" for Earth Day ...

While astronomers eventually ruled out the asteroid as a threat to our planet, it was always the ... Space Agency are releasing findings and images from the telescope's observations. Most ominously, ...