Vayu Hill-Maini's lab has created a new cheese, or at least something that tastes like cheese, but is actually made from food waste. The bioengineer, who runs a lab at Stanford University in California, is experimenting with fermentation using fungi. "One of the most amazing things that we found recently is that we could take waste and add a few other ingredients in a fungal fermentation and create this delicious cheese that is like a Pecorino or Parmigiano," he says. Fermentation is a