Today's story: Burglars often leave no fingerprints or hair behind, but they may still leave traces of themselves floating in the air. What if that could be used to help solve crimes? In an experiment in Oslo, Norway and Adelaide, Australia, researchers staged fake burglaries, and then tried to identify the "intruders" using DNA floating in the air. The result? They found evidence of the intruder more than half the time. But real-world use by police would be much more complicated. Transcript & Exercises: https://plainenglish.com/903

Get the full story and learning resources: https://plainenglish.com/903

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