Radioactive Isotopes Used to Protect South Africa's Rhinos from Poaching

The Rhisotope Project

• 🇿🇦 South African scientists are implementing the Rhisotope Project to combat wildlife trafficking, specifically targeting rhino poaching.
• ☢️ The core strategy involves inserting trace radioactive isotopes into rhino horns.

Deterring Poachers and Illegal Trade

• 💡 By making horns radioactive, the project aims to devalue them in the eyes of poachers and end-users, as no one wants a radioactive item.
• ✈️ This radioactivity acts as a deterrent, as radioactive horns will trigger alarms at airports, harbors, and customs offices, making illegal transport impossible.
• 🎯 The isotopes also make the horns traceable, aiding in the fight against illegal trade.

Impact and Support

• 💔 South Africa is home to the world's largest rhino population and faces significant poaching challenges, with 103 rhinos killed in the first quarter of 2025 alone.
• ✅ A pilot phase in June 2024 saw radioisotopes inserted into 20 rhinos.
• 🏥 The process, confirmed by Ghent University, is non-invasive and poses no risk to the animal.
• 🏆 The founder of the Rhino Orphanage calls this initiative a potential "holy grail" to save the species.
• 🌍 The project's success could lead to similar applications for protecting other endangered species.

Scientific Backing

• 🔬 The Rhisotope Project is led by the University of the Witwatersrand and supported by the International Atomic Energy Agency.
• 🔬 James Larkin from the university's Radiation and Health Physics Unit explained the rationale behind making horns radioactive.