A researcher holding a test tube with what the scientists called a sample of well-preserved blood they found in a carcass of a female mammoth discovered on a remote island in the Arctic Ocean. (AFP / NORTHEASTERN FEDERAA researcher holding a test tube with what the scientists called a sample of well-preserved blood they found in a carcass of a female mammoth discovered on a remote island in the Arctic Ocean. (AFP / NORTHEASTERN FEDERAL UNIVERSITY)L UNIVERSITY)

A researcher holding a test tube with what the scientists called a sample of well-preserved blood they found in a carcass of a female mammoth discovered on a remote island in the Arctic Ocean. (AFP / NORTHEASTERN FEDERAL UNIVERSITY)