Opportunity reaches `Perseverance Valley` precipice
(PHYSorg.com Space & Earth)

Now well into her 13th year roving the Red Planet, NASA`s astoundingly resilient Opportunity rover has arrived at the precipice of `Perseverance Valley` - overlooking the upper end of an ancient fluid-carved valley on Mars `possibly water-cut` that flows down into the unimaginably vast eeriness of alien Endeavour crater.