Mudbrick walls of the 3,400-year-old city, shown here enclosed by a distinctive “zig-zag” wall, stand some nine feet high in areas. COURTESY...

Mudbrick walls of the 3,400-year-old city, shown here enclosed by a distinctive “zig-zag” wall, stand some nine feet high in areas. COURTESY...
The Parkes radio telescope in New South Wales, Australia, run by the Commonwealth Scientific and Industrial Research Organisation (CSIRO), r...