Goddard's later work and legacy

Science correspondent Allan Blackman looks at the success of a new drug in helping to cure mild and severe cases of sleeping sickness, an illness prevalent in Africa caused by parasites spread through the bites of tsetse flies. He'll also look at the work of Robert Goddard in laying the groundwork for spaceflight over 100 years ago, and the new 'smart underpants' helping to record the number of farts wearers do - which can provide vital information for clinicians.