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Photo by @keriwilk Diver @jferraragallery 🐋12 sperm whales rotating between sleeping and socializing for almost two hours (and it happened to be the last afternoon of our expedition). #whales #whale #Nature #Underwater https://www.instagram.com/p/BznuRYUgvxC/?igshid=1bfe12p9y9zrb
Working better means working at night. Climate Healers, an international development technology organization, issued a design challenge last year after their traditional solar cookers failed to catch on in mountain villages in Rajasthan, India.
First, the cooker should operate in the early morning and late evening when the sun is not at peak. They should be able to cook indoors, sitting down. They cook for two hours each time. The stove top temperature should be about 200C, with heat delivered at approximately 1 KW to the cook surface.
