If meat is left out on the counter for too long, we all know we need to throw it out. But what about rice or pasta? Although that carby goodness might seem harmless after sitting on the bench for a bit, you'll probably think twice once you hear about the bacterium Bacillus cereus. It's not a particularly rare germ. B. cereus will happily live wherever it can – soil, food, or in the gut. "The known natural habitats of B. cereus are wide-ranging, including soil, animals, insects, dust and plants," Anukriti Mathur, a biotechnology researcher at the Australian National University,...