Yet in America's system of checks and balances, a choice between presidents cannot reliably be made by combing through policy programmes.

ECONOMIST: Crunch time

First, he remarked on the striking similarities between the present choice and that made by President Reagan's administration nearly a decade ago.

CENTERFORSECURITYPOLICY: Which side will we be on?

In Prof Nicolelis' first experiment, the encoder rat got a bigger reward if the decoder also made the right choice, leading to two-way neural collaboration between the two rats.

CNN: Do telepathic rats advent biologic computers?