But a variant of the technique, which involves measuring changes in the speed of the reflected wave, can reveal information about moisture.

ECONOMIST: Winemaking and radar

The intensity of the contest reflected a broader wave of changes taking place in other parts of Asia, where, from Thailand to China, rising incomes and the Internet's capacity to provide new information and opinions are raising expectations for more responsive governments.

WSJ: Malaysia Opposition Leader Vows to Fight 'Rigged' Vote

As its name suggests, it works by broadcasting a radar wave into the ground and interpreting (as any radar does) what is reflected back.

ECONOMIST: Winemaking and radar