Botswana’s elephants are struggling with a new disease. More than 280 elephants have died after showing bizarre symptoms, like walking in circles and appearing dizzy. The elephants’ tusks are still attached, so authorities do not suspect poaching. Other causes may be toxins, anthrax, poisoning, a virus, or some combination. Lab tests on the carcasses, soil, and water may reveal clues. The results could help scientists understand the ecosystem’s health overall.