In 25 regions of the country, in large cities and small towns alike, they will line up in their school courtyards and wait for a signal.

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Naturally, you wait for the signal to change.

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Instead, stick the probe in, place it on the fire and wait for the audio signal that the food is cooked.

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It even has cars that wait obediently at crossroads and signal before they turn.

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Back then many of us gathered with Beagle's mastermind, Prof Colin Pillinger, to wait to hear the first signal that the spacecraft had touched down safely.

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The third tip to reading body language like a pro is to notice the first signal, but wait for confirming cues before assigning meaning to what you see.

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This will have to wait until a public navigation signal is switched on, and it is likely to be 2015 before there are enough spacecraft in orbit for the system to start to show its true capability.

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