It's an ingestible electronic capsule that senses certain gases released in the human gut – some of the same stuff that you may already be familiar with when it eventually passes into the open air. The capsule's creator, electrical engineer Kourosh Kalantar-Zadeh, a professor at RMIT University in Melbourne, Australia, says that the device has already begun revealing secrets about the human gut. To test the capsule, Kalantar-Zadeh enlisted 26 healthy volunteers – one being himself. Each person ate the same diet to help rule out food as a cause for different results, except for two volunteers who ate a...