Many different approaches to record sound with magnetic recording for were developed over the years since the first demonstration of magnetic recording on steel wires by Danish inventor, Vladimir Poulsen, sometime between 1893 and 1898.

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One of them, iTesa, is to record the magnitude of the magnetic field around the phone during orbit.

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Computers have now replaced magnetic tape, meaning the devices can record more data and are far more likely to survive an impact.

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The magnetometer will record what, if any, magnetic field the asteroid has, thus revealing whether it was ever part of an object large enough to have possessed the molten iron core needed to generate such a field.

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Last year ALPHA used a magnetic trap to hold on to antihydrogen atoms for a record 16 minutes.

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Using a technique called functional magnetic resonance imaging (fMRI), the researchers were able to record the brain's activity in response to internal and external stimuli such as eating and drinking.

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