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a carving on the side of a building depicting an astronaut in space and other things
I find this a bit compelling, this is an actual carving on a 12th Century cathedral in Spain. How did 12th century sculptors know how our astronauts looked! The detail is to coincidental to be anything other than an astronaut! From the helmet to the umbilical air hose, and the detail on the bottom of the boots! Think about it.
an image of the back side of a poster with words and numbers in different languages
Infographic: How we’ll live on Mars
How We'll Live on Mars - infographic