And the hip-hop group Cypress Hill was set to perform a sold-out concert Saturday evening in Colorado's iconic Red Rocks Amphitheatre.

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Now with Solovev, his shotgun slung over his charcoal black t-shirt, we left the heli-tour boardwalk, wandered the river's gravel shore and sat on brick-red rocks at a pulsing spring called Malachite Grotto.

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Just back from three weeks in Kenya and Malawi, he's about to leave for a backpacking trip in Red Rocks, Utah, where he plans to unplug his Droid for six days.

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From there we made the sojourn west, to explore the red rocks of the southwestern United States from a base in Santa Fe, and later to visit the storied national parks in Utah, Montana and Wyoming.

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Seasonal fogs on the red planet would moisten the rocks with enough water to supply resident organisms.

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This time, the rocks were silhouetted against the red and oranges of the dipping sun.

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Those overruns are partly to blame for leaving Mars exploration short of the multibillion-dollar commitment needed for another "flagship" mission of the scale it would take to fetch rocks and soil from the Red Planet and bring them home.

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Kavanaugh sails through the crowd in a Tom Ford suit, clutching a bourbon on the rocks, which complements his ginger-red hair.

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Eventually mossy rocks give way to dense hedgerows, coloured with foxgloves and buttercups, then a red telephone box.

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These rocks landed on Earth about 2.5 million years ago, after being blasted off the Red Planet by a violent impact.

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