Leukemia appeared about 20-45 million years ago. It found an international team of geneticists.
A study published in the journal Proceedings of the National Academy briefly about it, reports The Telegraph.
According to scientists, that 20-45 million years ago, the disease was met at the ordinary long-winged — bats, currently under threat of extinction.
The studies revealed that the fossilized remains of animals were found traces of deltaretrovirus. Scientists believe that they were in the blood of animals and caused disease similar to leukemia.
Leukemia — a cancer in which bone marrow cells mutate, not developing into normal Mature white blood cells and become cancer cells. From other types of cancer it is different in that it does not form tumors in any one place.