Giant solar calendar in Peru (video)
The 2,500-year-old solar calendar in Chankillo was built by a civilization of which very little is known.
Professor Brian Cox has visited a giant desert solar calendar in Peru in his quest to understand the nature of time in creating and ending the universe.
- See also:
Mars the Red planet Mapped from Odyssey Spacecraft
Hubble Space Telescope 1 Million anniversary 
Dark Matter is now more mysterious 
The brilliant Power of Earth's Magnetosphere
Blue Dunes of Mars
Saturn rings and Tethys
Third Radiation Belt found Around Earth
How Big is the Universe?
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