Ancient plant pollen can testify as a forensic witness
Microscopic dust trapped on a suspect's boots can reveal a hidden history of their travels, turning billions of years of geological time into a courtroom timeline.
In a landmark Austrian murder case, authorities were stumped by a missing body until a pair of muddy boots landed on the desk of Wilhelm Klaus at the University of Vienna. Klaus, a paleobotanist, discovered a cocktail of modern plant life like spruce and willow trapped in the tread. However, the real breakthrough was the presence of fossilized hickory pollen from a species that had been extinct in the region for millions of years. This specific combination of modern flora and Miocene-aged rock deposits existed in only one tiny patch of the Danube River Valley, allowing investigators to pinpoint exactly where the suspect had been.