The last mammoth woolly groups died just over 4,000 years ago, but the prehistoric giants may be back soon, walking as if they were back in the ice age. In an article in the scientific journal Nature, Japanese scientists say they are an & # 39; important step & # 39; to bring the extinct species back to life. The explanation came after professionals transplanted cells extracted from the carcass of a mammoth to a mouse, where positive biological activity was recorded.
The cells were taken from a 28,000-year-old woolly mammoth named Yuka, found in excellent storage conditions on a glacier in Siberia. The animal, which died when it was about seven years old, is one of the best-preserved specimens known to science.
The team took tissue samples from bone marrow and animal muscles, which they described as "well-preserved." The structures were then injected into the mice, into cells that can undergo genetic division to form an egg.
The team said that after the procedure, a pronucleus-like structure emerged from the previously injected mammoth core. "These results indicate that some of the mammoth nuclei have the potential for nuclear reconstruction," the scientists said in the article. Despite the success, the scientists failed to verify the cell division needed to make a viable egg, "possibly due to DNA damage in the transferred nuclei."
"We want to move our study to the cell division stage, but we still have a long way to go," said researcher Kei Miyamoto, one of the study's authors, to the Japanese news agency "Nikkei."
Most mammoths died between 14,000 and 10,000 years ago. The last continental population existed 9,650 years ago on the Kyttyk peninsula in Siberia. However, the species survived more than 5000 years on Siberian islands, which were isolated from the mainland by retreating after the last ice age.
The last known population remained on the island of Wrangel in the Arctic Ocean until 4,000 years ago and was extinguished during the construction of the pyramids of Giza in Egypt.