Scientists have mapped the genetic code of a horse about 700,000 years old, making it the oldest mapped genome of any animal by 10 times.
The scientists used a tiny fossil found in the Canadian Yukon, and while most of the fossil was contaminated with modern bacteria, they were still able to get a good genetic picture of the ancient horse. Scientists said that for every 200 DNA molecules extracted from the fossil, only one belonged to the horse.
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