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Liz looks at the controversial science of genetically modified crops in Hawaii, while Dallas tries to remedy Jem's dust allergy by making him eat worms.
On the 50th anniversary of the invention of the laser, Jem Stansfield explains how they work and builds himself one. Dallas Campbell looks at the rise of Citizen Science.
The science series takes on a royal wedding theme. Jem builds a singing road as a present for the royal couple, while Dr Yan explains the science of dad dancing.