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 most striking trend in human evolution is the rapid increase in brain size over the past 3â4 million years, and the associated increase in cognitive complexity (1). Recent advances in comparative genomics and population genetics have facilitated rapid progress in studying the genetic basis of human brain evolution.By searching for signatures of adaptive evolution in genes known to function in the mammalian brain, a large number of candidate loci have been identified (2).ecent advances in comparative genomics and population genetics have facilitated rapid progress in studying the genetic basis of human brain evolution. By searching for signatures of adaptive evolution in genes known to function in the mammalian brain, a large number of candidate loci have been identified (2).