[aruanan]

Investigators are to install detectors beneath the Pyramid of the Sun that look for muons – charged particles generated when cosmic rays hit the atmosphere which continuously shower the Earth.

And I have been to the top of this pyramid. It's a cool view, but those nearly vertical staircases can really wind you at that altitude--and that was when I was in my twenties.

[blam]

"It's a cool view, but those nearly vertical staircases can really wind you at that altitude--and that was when I was in my twenties."

LOL. Tell me. The ones at Chichen Itza got me 20 years ago too.