Mysterious 'three-sided' pyramid on Mars fuels speculation about advanced alien civilizations

Evidence of alien life or cosmic pyramid scheme? A documentary filmmaker sparked a discussion of advanced Martian ...
来自MSN

NASA researcher maps how alien societies could fill the Milky Way

The Milky Way as a laboratory for civilizations Any attempt to chart alien societies has to start with the structure of The Milky Way itself, a disk roughly 100,000 light years across with hundreds of ...