Supernovae are known as element factories, but astronomers are now discovering that merging neutron stars and fast-spinning supernovae may also be capable of creating variants of the elements heavier than iron. Heavy elements are created through nuclear fusion. Venus shines in the west after sunset. Mars brightens up the east at Could the concept of ‘dark energy’ all be a big mistake? Next week, Skytalk examines new data showing that the key assumption made in the discovery of dark energy is in error.