American scholars Stephen and Kate Steinbeiser recently embarked on a challenging project: building a house out of mud, a traditional Jewish design.
Building an Environmentally Sustainable Mudhouse in Yemen
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A Star of David is often used to ward off the "evil eye" throughout Yemen. (E. Arrott/VOA)
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Several images taken by the Hubble Space Telescope in order to help identify key stellar distance markers known as Cepheid variable stars (Hubble Legacy Archive, ESA, NASA)