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Material World - 29/07/2010

Logo for Material World - 29/07/2010

Quentin Cooper presents his weekly digest of science in and behind the headlines. This week: the science behind crowd management, could cross-bred bees remove deadly parasites in hives and could singing also help stop the bee decline. And are we born with built in grammar knowledge and if we're not, can we learn it? The producer is Ania Lichtarowicz.