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They started with data on mitochondrial DNA previously collected from random blood donors.Scientists know the average rate of mutation, so they can look at the genetic variation among pairs of individuals to see when their lineages diverged. "Mutation is producing divergence, but some of the divergence is lost because of random events that occur, for example some populations become extinct," Kimmel said.A patient arrives in hospital with severe injuries from a car accident.He pulls through surgery and is placed in intensive care for recovery.Now an Australian team is beginning to unravel the cause and it offers a strange glimpse into the ancient life within us all.Ron was walking along this grassy verge when he was hit from behind at 60km/h.
The models make different assumptions about growth and extinction rates, which had the potential to change the estimate of mitochondrial Eve's age, the researchers found.
Mitochondrial DNA contains a region that changes rapidly and can provide a sort of molecular clock calibrated to times comparable to the age of modern humanity, making it a favorite for population geneticists, Kimmel said.
As part of the three-year project, Kimmel and Krzysztof Cyran, a Polish researcher, compared the estimates produced by about 10 genetic models intended to determine when mitochondrial Eve lived.
That's a force greater than the human body is evolved to withstand.
Professor Zsolt Balogh The highest damage injury 100 years ago was falling off from a horse.
After sustaining multiple leg fractures, a smashed pelvis and a crushed chest, Ron's heart stopped beating in the Emergency Department, but the medical team brought him back to life.