Guardian: When he is not watching his flock Silverio Chiquenayra-Quispe takes care of the Pumatalya weather station, located between the brightly coloured local council building, the chapel and the bovine artificial insemination centre. At 3,800 metres above sea level, on the high plateaus of the Andes, the little town is four hours by road from the provincial capital of Cusco in Peru.
Three times a day, at 7am, 1pm and 5pm, Chiquenayra-Quispe records the temperature, wind speed and rainfall. He takes readings...