DNA evidence can survive for hundreds, even thousands, of years, depending heavily on environmental conditions. This remarkable longevity allows for the analysis of ancient remains and, crucially, enables the investigation of cold cases dating back decades, even to the 1950s, provided the samples were properly collected and preserved.

Impact: High. The enduring nature of DNA underscores the critical importance of meticulous crime scene investigation and evidence preservation, as even seemingly insignificant samples can become pivotal in solving crimes years or decades later.

In the source video, this keypoint occurs from 00:27:16 to 00:28:42.

Sources in support: Megyn Kelly (Host)