This Thursday SUMS is hosting lightning talks: four speakers will each give brief (5-10 minute) talks on topics in their interest. The titles and speakers are: Tau: The Superior Alternative to Pi - Andy Tran (USyd undergrad) Infinite Infinities - Jonathan Zheng (Cambridge undergrad) Bad Sort Good Sort - Rachel Wong (Cambridge undergrad) Light and Geometry - Vaishnavi Calisa (USyd undergrad)