Our feeblest contemplations of the Cosmos stir us and elicit a tingling of the spine.

"Our feeblest contemplations of the Cosmos stir us - there is a tingling in the spine, a catch in the voice, a faint sensation, as if a distant memory, of falling from a height.  We know we are approaching the greatest of mysteries."

Carl Sagan  

Photo: Redstone spine and Fremont Cottonwood trees; Lory State Park, CO; October 16, 2012