Wandjina Rock, Australia • It's always been a mystery, although many do speculate, that aliens walk among us. Some have left their mark by using crop circles to communicate a message to us and others have had direct contact with other civilizations. The Wandjina Petroglyphs are a perfect example of this. It's odd really. Today we tend to describe these extra terrestials in the way of small heads, a flat mouth, and no nose.