Mosquitoes are pests. The bloodthirsty little suckers play a minor role in the food chain, but in much of the world, a major role in disease: diseases like malaria. Science has been fighting malaria for years, and yet it's still the leading killer of children in Sub-Saharan Africa. Tuesday morning at 9, we'll talk with local experts about how a tiny parasite called plasmodium has managed to evade the best minds in science and medicine, and why its days just might be numbered. Pictured: An Anopheles gambiae mosquito in flight after a blood meal. Inset: Plasmodium falciparum, the parasite that causes malaria.