Human defecation remains a taboo subject, despite the fact that 2.5 billion people lack toilets, causing a global health crisis that kills more than a million children each year.
The Human Impact
Scientists have discovered a new malaria-transmitting breed of mosquito which may pose an unknown threat in Kenya, where malaria is the leading cause of death.
Each year on Aug. 20 the London School of Hygiene & Tropical Medicine (LSHTM) celebrates Mosquito Day to honour the date in 1897 when British doctor Ronald Ross discovered that female mosquitoes transmit malaria between human beings. Ross was awarded a Nobel Prize in 1902 for his discovery.