Gut Infection. Gastroeteritis or the stomach flu can be caused by a virus, bacteria or parasites and causes inflammation of the lining of the digestive tract. Besides white poop, this infection can also cause chills, fever, vomiting, achiness, diarrhea or abdominal pain.
Last Updated: Human evolution, the process by which human beings developed on Earth from now-extinct primates. Viewed zoologically, we humans are Homo sapiens, a culture-bearing, upright-walking species that lives on the ground and very likely first evolved in Africa about 315,000 years ago.
The precision with which these events can be reconstructed is one reason the evidence from molecular biology is so compelling. Another reason is that molecular evolution has shown all living organisms, from bacteria to humans, to be related by descent from common ancestors.