Snaring burglars
Got a problem with burglars? Try leaving a piece of pizza out for them.

“Police say thieves often cannot resist tucking into a snack after breaking into a home, and traces of saliva on the food remains can yield a telltale signature of the criminal’s DNA.

A handful of hungry crooks have been caught and jailed this way over the past decade, a phenomenon that has prompted curious scientists to wonder which foods may yield the best saliva sample.”