EP 221: How to build a woolly mammoth with Beth Shapiro of Colossal Biosciences

EP 221: How to build a woolly mammoth with Beth Shapiro of Colossal Biosciences

by Beth Shapiro

Life & Natural Systems Engineering & Technology TCBBiotechnologyTCBGGenetic engineering
🎙 Beth Shapiro 👥 942 📅 January 8, 2026 ⏱ 51 min 👁 311 📄 expert opinion 🧭 2026-08-16
Available in: English (current) Français

Keywords

ancient DNAde-extinctionwoolly mammothgenome engineeringconservation

Summary

In this episode of The Genetics Podcast, host Patrick Short interviews Dr. Beth Shapiro, Chief Science Officer at Colossal Biosciences. Shapiro recounts her path from journalism to ancient DNA research, starting with her work on American bison and the dodo at Oxford. She explains that true cloning of a mammoth is impossible due to the lack of living cells, so de-extinction relies on genome engineering. The process involves sequencing ancient DNA fragments and mapping them to the Asian elephant genome, which shares over 99% similarity with mammoths. By comparing multiple mammoth genomes, researchers identify key differences that can be edited into an elephant cell. Shapiro discusses the concept of ‘functional de-extinction’ and the technical hurdles, such as the need for better genome assembly and gene editing tools. She emphasizes that the same technologies are crucial for conservation, citing examples like engineering disease resistance in Hawaiian honeycreepers. The episode also covers ethical considerations, including collaboration with Indigenous communities, and outlines the next decade’s scientific breakthroughs needed to make de-extinction viable.

169 words

Critical Evaluation

Value of the Information & Strength of the Argument

The value of the information is high, as it provides an authoritative, insider perspective on the current state and future of de-extinction science. Shapiro clearly explains the technical steps and challenges, making complex concepts accessible without oversimplifying. The argumentation is solid, grounded in her extensive research and practical experience. She presents a compelling case for the conservation benefits of these technologies, though she acknowledges ethical and technical limitations. The discussion is balanced, covering both the potential and the hurdles.

Scientific Rigor, Source Quality, Title Accuracy

The scientific rigor is strong, with Shapiro referencing her own published work and that of others, such as the 1984 quagga study and the work of Sergey Zimov. The quality of sources is high, though the episode is an interview and not a peer-reviewed presentation. The title accurately reflects the content, focusing on the scientific process of building a mammoth. The discussion is well-structured, and the claims are consistent with current scientific understanding.

167 words

Title / Content Match

The title accurately reflects the content: the episode focuses on the science and process of de-extinction, with Beth Shapiro explaining the steps to build a woolly mammoth.

Quality & Reliability

8/10

Beth Shapiro is a leading expert in ancient DNA and evolutionary genetics, with a strong publication record. The discussion is scientifically grounded, but as an interview, it reflects her personal perspective and may not cover all counterarguments.

Chapters

Cited Sources

  • Colossal Biosciences — Official website of the company where Beth Shapiro serves as Chief Science Officer, mentioned in the show notes.
  • Podcast review link — Link provided in the description for listeners to rate and review the podcast.

Concurring Sources

  • Colossal Biosciences — The company's website provides information on their de-extinction projects, consistent with the discussion.

Contribution & Novelties

The episode provides a detailed, up-to-date overview of the scientific approach to de-extinction, specifically for the woolly mammoth, from a leading expert. It clarifies misconceptions about cloning and explains the genome engineering process. The discussion also highlights the broader conservation applications of these technologies.

Pour aller plus loin :

  • Ancient DNA — Provides background on the field and its methods.
  • De-extinction — Overview of the concept and various approaches.
  • Asian elephant genome — Reference genome used in the process, accessible via NCBI.
  • Pleistocene Park — Project mentioned by Shapiro for ecosystem restoration with large herbivores.

95 words

Radar Profile

The radar profile shows high scores across all dimensions, indicating a well-rounded and reliable source. The highest scores are in information quantity and quality, reflecting the depth of the discussion. The technical level is also high, suitable for an informed audience.

Reliability 8/10