An article published in the journal “Nature Astronomy” describes a possible way for the molecules known as polycyclic aromatic hydrocarbons (PAHs) to form at the very low temperatures existing on Titan, Saturn’s big moon. A team of researchers carried out experiments and simulations to understand how certain complex molecules could form in the haze layers in Titan’s atmosphere when in theory they required much higher temperatures. The result is the discovery that the presence of two gases can produce that type of molecules even at very low temperatures.