象牙上的线索揭示了什么

来源: Nat Geo Photo of the Day

原文
A man wearing a medical mask, blue PPE, and blue medical gloves brushes powder over a large elephant tusk.

What the Tusks Reveal

London Metropolitan Police forensic photographer Mark Moseley used his crime scene expertise to develop a process for revealing human fingerprints on porous elephant tusks. The photo was featured in an August 2025 story about how new forensic technologies and crime-fighting techniques are helping stop the illegal wildlife trade.

Britta Jaschinski, National Geographic Image Collection