While some crop circles can be explained, others remain a mystery. The crop circles that cannot be proven to be man-made often exhibit peculiar characteristics.
Not all cities have their roots in Antiquity; here are 10 of the world's most gorgeous ancient cities.
The elements of one of the world's harshest climates can wreak havoc on anything man-made, even while providing the perfect climate for it to be preserved.
A look at 15 of the world's largest organisms, from whales to bears and elephants; even trees are included.
Some historic structures, like Angkor Wat in Cambodia or the pyramids in Egypt, draw hundreds of thousands of tourists. Others have been reclaimed by nature.
Films like Madagascar tell exciting stories of animals escaping from their captors, yet the characters' real-life counterparts still sit behind bars -- except these lucky few.
After looking at meteors in a previous post, now we view comets and their place in our lives.
We're reminded of the inherent beauty of celestial objects large or small, and that we may not always have the chance to view them as we do now.
A look at stunning temples and monuments built into massive, natural caves.
Renewable energy power plants are usually upgraded before they fall into disrepair. Yet sometimes relics of a renewable past are left scattered across the landscape.