A strange disease outbreak in Nigeria has possibly killed 28 in the past 3 days in Nigeria’s Ondo State, according to residents. The disease spreads rapidly, causes blindness and loss of consciousness, and kills its victims within 24 hours, residents report. The cause of…

After last year’s record-busting drought in Brazil’s southeast, recent rainfall brought relief to residents—but also gave a helping hand to dengue-transmitting mosquitoes. Last year’s dry spell deprived the mosquitoes of their favored breeding ground—stagnant puddles—and…