Herpes Infected Humans Before They Were Human

The virus originated in chimpanzees, jumping into humans 1.6 million years ago

Researchers at the University of California, San Diego School of Medicine have identified the evolutionary origins of human herpes simplex virus (HSV) -1 and -2, reporting that the former infected hominids before their evolutionary split from chimpanzees 6 million years ago while the latter jumped from ancient chimpanzees to ancestors of modern humans – Homo erectus – approximately 1.6 million years ago. … Read the full story from the UC San Diego News Center

How Infectious Disease May Have Shaped Human Origins

Inactivation of two genes may have allowed escape from bacterial pathogens, researchers say

Roughly 100,000 years ago, human evolution reached a mysterious bottleneck: Our ancestors had been reduced to perhaps five to ten thousand individuals living in Africa. In time, “behaviorally modern” humans would emerge from this population, expanding dramatically in both number and range, and replacing all other co-existing evolutionary cousins, such as the Neanderthals. … Read the full story from the UCSD Newsroom