Stemming from the “F-theory” branch of string theory, each solution replicates key features of the standard model of particle physics.
https://www.scientificamerican.com/article/found-a-quadrillion-ways-for-...
Featuring the work of Professor Mirjam Cvetic, Dr. Ling Lin and Muyang Liu at the University of Pennsylvania; and Proferssor James Halverson and Jiahua Tian at Northeastern University: https://arxiv.org/abs/1903.00009