Radioactive Isotopes Introduced into Rhino Horns to Deter Poachers

Radioactive isotopes are being introduced into the horns of rhinos in South Africa to protect them from poachers. According to scientists, the doses used are completely safe for the animals' health but are sufficient to trigger radiation detectors at airports and border checkpoints. This will help catch smugglers crossing borders and, in the long term, make hunting rhinos pointless.