Apparently there's a new consensus: the "five second rule" still may apply.
Aston University Professor Anthony Hilton says that while recovering morsels from the floor are "never completely without risk," it may be ok to consume some food within five seconds of it falling off your plate.
He adds: “Obviously, food covered in visible dirt shouldn't be eaten, but as long as it's not obviously contaminated, the science shows that food is unlikely to have picked up harmful bacteria from a few seconds spent on an indoor floor."
Read more, below. And...eat at your own risk.