Newer news in this area: https://news.ycombinator.com/item?id=44751923 https://news.ycombinator.com/item?id=44751923 Making their horns radioactive causes few

Newer news in this area: https://news.ycombinator.com/item?id=44751923 https://news.ycombinator.com/item?id=44751923 Making their horns radioactive causes fewer problems for the rhinos, makes it trivial for Customs to find poached horns, and seems likely to spook the end purchasers.