Huts painted lilac, turquoise and pink stand out against a rust-coloured hillside.

ECONOMIST: South Africa and its Zulus

Over millions of years this created an oxygen-rich atmosphere that rapidly removed electrons from minerals near the surface, creating rust out of iron and forming thousands of new minerals from other metals like nickel, copper and uranium.

ECONOMIST: Minerals

He showed few signs of rust, however, striking out four in a row at one stretch in his 7 1-3 innings.

WSJ: Pettitte earns win as Yankees beat Blue Jays 9-4