Saturday, November 8, 2025

Texas A&M researchers use radioactive material to help protect African rhinos from poachers – Houston Public Media

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Introduction to the Rhisotope Project

The Rhisotope Project is a collaborative effort between researchers at Texas A&M University’s Nuclear Engineering Department and the University of the Witwatersrand in South Africa. The project aims to protect rhinos from poaching by injecting radioactive material into their horns. This innovative approach uses radiation to deter poachers and help identify illegally poached horns at international ports of entry.

How the Rhisotope Project Works

The project involves inserting a small radioactive metal rod into the horn of a rhino. This rod is safe for the rhino and its caretakers, but it makes the horn detectable by radiation portal monitors at ports of entry. The radiation levels from the metal are low enough not to harm the rhino, but high enough to be detected by customs officials. The process of injecting the radioactive material into the rhino’s horn is done under sedation, and the horn is then sealed to prevent the radiation from escaping.

Benefits of the Rhisotope Project

The Rhisotope Project has several benefits. Firstly, it deters poachers from targeting rhinos with radioactive horns. The fear of handling radioactive material is a significant deterrent, and poachers are less likely to take the risk. Secondly, the radiation helps customs officials identify illegally poached horns at international ports of entry. This makes it more difficult for poachers to sell the horns on the black market. Finally, the project reduces the demand for rhino horns by making them less desirable to consumers.

The Science Behind the Rhisotope Project

The Rhisotope Project is the result of complex calculations and simulations. Researchers had to map out the radiation sources and calculate the doses to the animal to ensure its safety. The project uses a small metal pin that contains a radioactive isotope, which is inserted into the rhino’s horn. The pin is then sealed, and the horn is monitored to ensure that the radiation levels are safe.

Expansion and Future Plans

The Rhisotope Project has already treated 30 rhinos, and the goal is to treat 180 across two locations by the end of 2025. The ultimate goal is not to treat all of South Africa’s rhinos but to create a deterrent effect by making it risky for poachers to target locations with treated rhinos. The project is also being explored as a way to help other vulnerable animals, such as pangolins, which are being poached for their scales.

Conclusion

The Rhisotope Project is a unique and innovative approach to protecting rhinos from poaching. By using radiation to deter poachers and identify illegally poached horns, the project has the potential to make a significant impact on the conservation of these magnificent creatures. The project also highlights the importance of nuclear research and its potential applications beyond power generation. As the project continues to expand and evolve, it is likely to have a positive impact on the conservation of rhinos and other vulnerable animals.

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