MOKOPANE, South Africa (AP) — A South African university launched an anti-poaching campaign Thursday to inject the horns of rhinos with radioactive isotopes that it says are harmless for the animals but can be detected by customs agents.
Under the collaborative project involving the University of the Witwatersrand, nuclear energy officials and conservationists, five rhinos were injected in what the university hopes will be the start of a mass injection of the declining rhino population.
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Professor James Larkin drills a hole into a rhinos horn to inject with radioactive isotopes, at a rhino orphanage in Mokopane, South Africa, Thursday, July 31, 2025. (AP Photo/Alfonso Nqunjana)
Rhinos are photographed at a rhino orphanage in Mokopane, South Africa, Thursday, July 31, 2025. (AP Photo/Alfonso Nqunjana)
Professor James Larkin injects the horn of a rhino with radioactive isotopes, at a rhino orphanage in Mokopane, South Africa, Thursday, July 31, 2025. (AP Photo/Alfonso Nqunjana)
A sedated rhino is being prepared before a hole is drilled into its horn and isotopes carefully inserted, at a rhino orphanage in Mokopane, South Africa, Thursday, July 31, 2025. (AP Photo/Alfonso Nqunjana)
They're calling it the Rhisotope Project.
Last year, about 20 rhinos at a sanctuary were injected with isotopes in trials that paved the way for Thursday's launch. The radioactive isotopes even at low levels can be recognized by radiation detectors at airports and borders, leading to the arrest of poachers and traffickers.
Researchers at Witwatersrand's Radiation and Health Physics Unit say that tests conducted in the pilot study confirmed that the radioactive material was not harmful to the rhinos.
“We have demonstrated, beyond scientific doubt, that the process is completely safe for the animal and effective in making the horn detectable through international customs nuclear security systems,” said James Larkin, chief scientific officer at the Rhisotope Project.
“Even a single horn with significantly lower levels of radioactivity than what will be used in practice successfully triggered alarms in radiation detectors,” said Larkin.
The tests also found that horns could be detected inside full 40-foot shipping containers, he said.
The International Union for Conservation of Nature estimates that the global rhino population stood at around 500,000 at the beginning of the 20th century but has now declined to around 27,000 due to continued demand for rhino horns on the black market.
South Africa has the largest population of rhinos with an estimated 16,000 but the country experiences high levels of poaching with about 500 rhinos killed for their horns every year.
The university has urged private wildlife park owners and national conservation authorities to have their rhinos injected.
AP Africa news: https://apnews.com/hub/africa
Professor James Larkin drills a hole into a rhinos horn to inject with radioactive isotopes, at a rhino orphanage in Mokopane, South Africa, Thursday, July 31, 2025. (AP Photo/Alfonso Nqunjana)
Rhinos are photographed at a rhino orphanage in Mokopane, South Africa, Thursday, July 31, 2025. (AP Photo/Alfonso Nqunjana)
Professor James Larkin injects the horn of a rhino with radioactive isotopes, at a rhino orphanage in Mokopane, South Africa, Thursday, July 31, 2025. (AP Photo/Alfonso Nqunjana)
A sedated rhino is being prepared before a hole is drilled into its horn and isotopes carefully inserted, at a rhino orphanage in Mokopane, South Africa, Thursday, July 31, 2025. (AP Photo/Alfonso Nqunjana)
WASHINGTON (AP) — President Donald Trump issued a flurry of pardons in recent days, including for the father of a large donor to his super PAC, a former governor of Puerto Rico and a woman whose sentence he commuted during his first term but who ended up back in prison for a different scheme.
Trump commuted the sentence of Adriana Camberos just before his first stint in the White House ended in 2021. That followed her being convicted as part of an effort to divert 5-Hour Energy drink bottles acquired for resale in Mexico and instead keep them in the U.S. Prosecutors said she and several co-conspirators attached counterfeit labels and filled the bottles with a phony liquid before selling them.
In 2024, she and her brother, Andres, were convicted in a separate case, this one involving lying to manufacturers to sell wholesale groceries and additional items at big discounts after pledging that they were meant for sale in Mexico or to prisoners or rehabilitation facilities. The siblings sold the products at higher prices to U.S. distributors, prosecutors said.
The Camberoses were among 13 pardons Trump issued Thursday, along with eight commutations. An additional pardon was announced Friday for Terren Peizer, a resident of Puerto Rico and California who headed the Miami-based health care company Ontrak.
Peizer had been convicted and sentenced to 42 months in prison, and fined $5.25 million, for engaging in an insider trading scheme to avoid losses exceeding $12.5 million, according to the Justice Department.
The president has issued a number of clemencies during the first year of his second term, many targeted at criminal cases once touted by federal prosecutors. They’ve come amid a continuing Trump administration effort to erode public integrity guardrails — including the firing of the Justice Department’s pardon attorney.
Also pardoned this week was former Puerto Rico Gov. Wanda Vázquez, who had pleaded guilty last August to a campaign finance violation in a federal case that authorities say also involved a former FBI agent and a Venezuelan banker. Her sentencing had been set for later this month.
Federal prosecutors had been seeking one year behind bars, something Vázquez’s attorneys opposed as they accused prosecutors of violating a guilty plea deal reached last year that saw previous charges including bribery and fraud dropped.
They had noted that Vázquez had agreed to plead guilty to accepting a promise of a campaign contribution that was never received.
Also involved in the case was banker Julio Herrera Velutini, whose daughter, Isabela Herrera, donated $2.5 million to Trump's MAGA Inc. super PAC in 2024, and gave the group an additional $1 million last summer. The case's third defendant was former FBI agent Mark Rossini, who was also pardoned by the president.
The recent wave of clemencies joins previous Trump pardons of Democratic former Illinois Gov. Rod Blagojevich and Republican ex-Connecticut Gov. John Rowland, whose promising political career was upended by a corruption scandal and two federal prison stints.
Trump also pardoned former U.S. Rep. Michael Grimm, a New York Republican who resigned from Congress after a tax fraud conviction and made headlines for threatening to throw a reporter off a Capitol balcony over a question he didn’t like. Reality TV stars Todd and Julie Chrisley, who had been convicted of cheating banks and evading taxes, also got Trump pardons.
The president also pardoned Texas Democratic Rep. Henry Cuellar in a bribery and conspiracy case. He later expressed regret and frustration for having done so, however, when Cuellar announced he was seeking reelection without switching parties to become a Republican.
President Donald Trump points after arriving at Palm Beach International Airport on Air Force One, Friday, Jan. 16, 2026, in West Palm Beach, Fla. (AP Photo/Julia Demaree Nikhinson)
