Tests point to a toxic algal bloom that might have led to the unprecedented deaths of hundreds of African elephants in Botswana earlier this year, but the evidence isn’t conclusive.
Conservationists declare victory as the country agrees to crack down on domestic ivory sales, which have contributed to the near-extinction of elephant species.
At least seven species of herpesvirus commonly infect elephants. At zoos, keepers scramble to save calves, who are particularly vulnerable to the viruses.