The femur belongs to Futalognkosaurus, an enormous leaf-eater discovered at this spot.

BBC: The dinosaur route of northwest Patagonia

When in leaf it's easier to spot because it seems as if the foliage has been damaged by a severe frost and turns limp and black.

BBC: The heartbreak of watching the slow death of ash trees

Alan Howard, a Los Angeles dentist who says he has only once been able to find a charging spot since he bought a Nissan Leaf last year, says making electric drivers pay for parking isn't the answer.

WSJ: It's Less Easy Being 'Green' as Los Angeles Yanks Plug on Free Parking for Electric Cars