Can a digital camera see as well as the human eye? Why do some chemicals stain more than others? Does our taste fade with age? We tackle these questions this week on Ask the Naked Scientists, as well as finding out if cars can run on water, if motion-sensitive lights could light our way out of darkness and discovering if our old shower heads could be spraying more than just water. Like this podcast? Please help us by supporting the Naked Scientists Like this podcast? Please help us by supporting the Naked Scientists