London's beloved Kew Gardens is a popular tourism destination - but it's also a hot-bed of scientific discovery. ⁣ ⁣ As Kew seeks donations to renovate its tropical Palm House, research leader Dr Tom Prescott explains how scientists can test the species within it – with startling results. ⁣ ⁣ He recounts how one species – the Madagascar periwinkle – produces chemicals that are now approved pharmaceutical drugs to fight leukemia. ⁣ ⁣ What other medical wonders might under Kew's aging glass roof? ⁣ ⁣ #medicine #science #nature #kew #london⁣