How do you get an old pen to work?

Ask the Naked Scientists

English - December 19, 2014 13:31 - 25 minutes - 23 MB - ★★★★★ - 60 ratings
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Why does scribbling on paper get a pen to work? Why can't mules reproduce? How soon will they be able to lessen the effects of Multiple Sclerosis? When you burn wood, where does the weight go? How do touch screens work? Plus, why feeling your age might be bad for you... Like this podcast? Please help us by supporting the Naked Scientists