Why so little ancient Indian art survives

The Aztec city of Tenochtitlan used dams to separate salty lake water from rainwater and control the level of Lake Texcoco. Spanish forces destroyed the dams during the 1521 siege, and they were never rebuilt. Flooding became a major problem for Mexico City, later built over the site.

Australia's Constitution requires jury trials for Commonwealth offences prosecuted on indictment. But Parliament has substantial influence over which offences are prosecuted that way. As a result, the constitutional protection is narrower than it first appears. The wording creates a right whose practical reach depends partly on legislative choices.