CNN: Human DNA can now be pulled from thin air or a footprint on the beach. Here’s what that could mean

CNN: Human DNA can now be pulled from thin air or a footprint on the beach. Here’s what that could mean. “Footprints left on a beach. Air breathed in a busy room. Ocean water. Scientists have been able to collect and analyze detailed genetic data from human DNA from all these places, raising thorny ethical questions about consent, privacy and security when it comes to our biological information.”