Resurrection of a Woolly Mammoth: Yuka


Eight years ago, an astonishing discovery sent shockwaves through the scientific community. An impeccably preserved woolly mammoth, believed to have perished some 4,000 years ago, emerged from the frozen depths of the Siberian permafrost. What makes this specimen even more remarkable is its age, dating back a staggering 28,000 years. In this article, we delve into the captivating journey of Yuka, as she is fondly named by researchers, and the astounding revelations about her biological materials.

Signs of Life from the Past

Skeleton of Columbian mammoth, Mammuthus columbi, in the George C. Page Museum at the La Brea Tar Pits, Los Angeles, California. Source: Wikimedia Commons

Scientists have been captivated by Yuka’s story and, more importantly, the potential insights she can offer into the distant past. In a recent study published in Scientific Reports, significant progress has been made in unraveling the mysteries that lie within this ancient giant. According to Fox News, cells extracted from this 28,000-year-old mammoth have displayed “signs of biological activities.” These cells, when introduced into mouse oocytes (specialized cells within ovaries capable of forming egg cells), have shown remarkable vitality.

Study author Kei Miyamoto from the Department of Genetic Engineering at Kindai University stated, “This suggests that, despite the millennia that have passed, cellular activity is still possible, and some aspects of it can be rekindled.” This breakthrough marks a departure from previous studies that primarily focused on analyzing fossil DNA without considering whether it still functioned.

The Arduous Path to Discovery

The path to confirming that mammoth DNA could still function was far from straightforward. Researchers embarked on a meticulous journey, beginning by extracting bone marrow and muscle tissue samples from Yuka’s leg. These samples were then scrutinized for the presence of undamaged nucleus-like structures. Once identified, these structures were carefully extracted.

Subsequently, these nuclei cells were combined with mouse oocytes, and mouse proteins were introduced. This combination revealed that some of the mammoth cells were fully capable of nuclear reconstitution. This groundbreaking discovery hinted that even after 28,000 years, mammoth remains could harbor active nuclei.

Remarkably, five of these cells exhibited highly unexpected and promising signs of activity typically associated with cell division. Nevertheless, the study underscores that there is much work ahead. It noted, “In the reconstructed oocytes, the mammoth nuclei showed the spindle assembly, histone incorporation, and partial nuclear formation; however, the full activation of nuclei for cleavage was not confirmed.”

Yuka’s Unique Place in History

Yuka, the 28,000-year-old mammoth. Source: Kindai University

Yuka, the resilient mammoth from the Siberian permafrost, was a part of a population that defied extinction for an additional 4,000 years on Wrangel Island in the Arctic Ocean. While the discovery of signs of structural DNA integrity in Yuka’s ancient cells doesn’t guarantee the revival of the mammoth species, it certainly complements ongoing research efforts in the scientific community.

Miyamoto acknowledges, “We are very far from recreating a mammoth.” However, numerous researchers are optimistic about the potential of gene editing techniques, with CRISPR being a standout example. Harvard and MIT geneticist George Church, a co-founder of CRISPR, leads the Harvard Woolly Mammoth Revival team. Their goal is to introduce mammoth genes into Asian elephants, primarily for environmental reasons related to climate change.

Church explains, “The elephants that lived in the past—and elephants possibly in the future—knocked down trees and allowed the cold air to hit the ground and keep the cold in the winter, and they helped the grass grow and reflect the sunlight in the summer.” This dual impact could significantly impact soil temperature and foster a rich ecosystem.

The Journey Ahead

As of now, Miyamoto’s team remains focused on reaching the stage of cell division. With the remarkable progress made thus far, the prospects of success appear promising. While the resurrection of the woolly mammoth is not guaranteed, the scientific community continues to push the boundaries of what is possible.


The saga of Yuka, the 28,000-year-old woolly mammoth, is a testament to the relentless pursuit of scientific knowledge and the unquenchable thirst for discovery. While the road ahead is arduous and fraught with challenges, the signs of life within Yuka’s ancient cells offer a glimmer of hope for a species long extinct.


1. Can scientists really bring the woolly mammoth back to life?

While progress has been made in reviving the woolly mammoth, it’s essential to note that we are still far from achieving this goal. The process involves numerous challenges, and researchers continue to work towards it.

2. What is CRISPR, and how does it relate to mammoth revival?

CRISPR is a revolutionary gene-editing tool. Researchers like George Church are exploring the possibility of using CRISPR to introduce mammoth genes into Asian elephants as part of the revival effort.

3. Why is the resurrection of the woolly mammoth important?

Bringing back the woolly mammoth could have significant ecological benefits. They could help mitigate climate change by impacting ecosystems in ways similar to their ancient counterparts.

4. What role did Yuka play in this research?

Yuka, the well-preserved mammoth, served as a critical specimen for studying the viability of ancient DNA. Her discovery sparked new hope and research in mammoth revival.

5. What challenges lie ahead for mammoth revival?

The primary challenges include achieving successful cell division and addressing ethical and ecological concerns associated with reviving an extinct species.

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