Why does Jacob Zuma giggle in parliament?

Why does Jacob Zuma giggle in parliament? Antimatter and Dark Matter; why snails like to eat cigarette filters; rusty water cisterns; why tupperware stays wet after dishwashing; cyanobacteria in water courses; and how gravity works. Plus, news of the antibiotic apolcalypse: evidence of human carriage with bacterial strains resistant to the antibiotic colistin secondary to farm use. Dr Chris joins Redi Thlabi to answer your burning science questions... Like this podcast? Please help us by supporting the Naked Scientists