Interesting the discussion we've been having in the UFOs thread about "evidence" More data on the Martian meteorite:

http://www.timesonline.co.uk/tol/news/science/space/article6934078.ece

Even if all turns out as they say, these would not exactly be advanced technological beings, but a start.

"Dennis Bazylinski, an astrobiologist from the University of Nevada who peer-reviewed the findings, said: “Until now I was on the fence but this paper has really thrown out the non-biological explanation.” However, he added that the study was not a “smoking gun” for life on Mars. “One meteorite is never going to answer such a complex question,” he said. "

This image has always made me look twice or thrice, too:

http://marsrovers.jpl.nasa.gov/gallery/all/1/m/034/1M131201699EFF0500P2933M2M1.JPG