Researchers figured out why hundreds of elephants dropped dead in Botswana this year: Their water was poisoned by algae
                            2020-09-23 21:58
                        
                    
                            Months after 330 elephants inexplicably died in Botswana, officials identified the cause of the die-off: toxic bacteria in their watering holes.
                        
                         
                                                         
                                                        