BBC News
By Ruth Alexander
image captionBuilding Lego towers is a competitive business - this one in Prague, at 32.5m, may be the tallest to date
It s not just children who like to build towers with Lego - the internet is alive with discussion on how many Lego bricks, stacked one on top of the other, it would take to destroy the bottom brick. So what s the answer?
There has been a burning debate on the social news website Reddit.
It s a trivial question you might think, but one the Open University s engineering department has - at the request of the BBC s More or Less programme - fired up its labs to try to answer.
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