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Episode 2 — The Prospect of Immortality & Human Cryopreservation

Host: Kyle O’Brien — https://twitter.com/analog_kyle.

Guest: Emil Kendziorra — https://twitter.com/emilkendziorra.
Founder of @TomorrowBio.

Theme || the prospect of immortality & human cryopreservation.

Is Death just a Technical Problem we haven’t solved yet?

In this episode of State Change, Kyle O’Brien sits down with Emil Kendziorra, founder of Tomorrow Bio, to explore the science, ethics, and future of cryopreservation — the process that may one day allow humans (and even pets) to be revived centuries from now.

We talk about the brain, identity, consciousness, why people fear death, and what it means to rewrite the social contract when life extension becomes real.

Ultrastructural and Histological Cryopreservation of Mammalian Brains by Vitrification

Studies of whole brain cryopreservation are rare but are potentially important for a variety of applications. It has been demonstrated that ultrastructure in whole rabbit and pig brains can be cryopreserved by vitrification (ice-free cryopreservation) after prior aldehyde fixation, but fixation limits the range of studies that can be done by neurobiologists, including studies that depend upon general molecular integrity, signal transduction, macromolecular synthesis, and other physiological processes. We now show that whole brain ultrastructure can be preserved by vitrification without prior aldehyde fixation. Rabbit brain perfusion with the M22 vitrification solution followed by vitrification, warming, and fixation showed an absence of visible ice damage and overall structural preservation, but osmotic brain shrinkage sufficient to distort and obscure neuroanatomical detail. Neuroanatomical preservation in the presence of M22 was also investigated in human cerebral cortical biopsies taken after whole brain perfusion with M22. These biopsies did not form ice upon cooling or warming, and high power electron microscopy showed dehydrated and electron-dense but predominantly intact cells, neuropil, and synapses with no signs of ice crystal damage, and partial dilution of these samples restored normal cortical pyramidal cell shapes. To further evaluate ultrastructural preservation within the severely dehydrated brain, rabbit brains were perfused with M22 and then partially washed free of M22 before fixation. Perfusion dilution of the brain to 3-5M M22 resulted in brain re-expansion and the re-appearance of well-defined neuroanatomical features, but rehydration of the brain to 1M M22 resulted in ultrastructural damage suggestive of preventable osmotic injury caused by incomplete removal of M22. We conclude that both animal and human brains can be cryopreserved by vitrification with predominant retention of ultrastructural integrity without the need for prior aldehyde fixation. This observation has direct relevance to the feasibility of human cryopreservation, for which direct evidence has been lacking until this report. It also provides a starting point for perfecting brain cryopreservation, which may be necessary for lengthy space travel and could allow future medical time travel.

The authors have declared no competing interest.

From organoid culture to manufacturing: technologies for reproducible and scalable organoid production

Despite the absence of a fully established regulatory framework or unified technological standard for industrial-and clinical-grade organoid biomanufacturing yet, substantial progress has been made toward building the technical and institutional infrastructure required for scalability and reproducibility. The Organisation for Economic Co-operation and Development (OECD) introduced the Good In Vitro Method Practices (GIVIMP)19, an international quality-assurance framework that defines laboratory quality systems, method qualification, reference controls, equipment calibration, and data integrity—principles that now potentially serve as quantitative benchmarks for process validation in organoid production. Complementing this, the NIH Standardized Organoid Modeling (SOM) Center was recently established to promote the development of organoid platforms that are reproducible, robust, and broadly accessible for translational biomedical and pharmaceutical research.

Expanding these standardization efforts, a recent publication introduced the Essential Guidelines for Manufacturing and Application of Organoids, delineating a systematic workflow encompassing cell sourcing, culture optimization, quality control, and biobanking logistics20. Their framework identifies organ-specific critical quality attributes (CQAs)—including growth-factor composition, morphological fidelity, and quantitative analytical metrics—and recommends standardized cryopreservation conditions (~100–200 organoids per vial) to enhance batch comparability. Likewise, a recent study established quantitative criteria for human intestinal organoid standardization, specifying cell-line provenance, minimum lineage composition thresholds (e.g., ≥30% enterocytes), and molecular marker expression profiles consistent with physiological differentiation21. Taken together, these coordinated initiatives—from international organizations to national agencies and individual laboratories—represent an emerging global framework toward reproducible, quality-controlled, and scalable organoid biomanufacturing, laying the groundwork for eventual regulatory convergence and clinical translation.

In response to these prevailing limitations and in alignment with global standardization trends, a range of engineering strategies has been developed, shifting the paradigm from organoid culture to organoid manufacturing by enabling reproducible and scalable organoid production. These strategies broadly focus on two goals: improving reproducibility by minimizing uncontrolled variation in the culture environment as well as by regulating intrinsic morphogenetic processes, and enhancing scalability by increasing productivity and throughput. To this end, recent advances can be categorized into three major domains: cellular engineering approaches that regulate morphogenetic processes through programmed cell organization; material-based strategies that establish defined and controllable environmental cues; and platform-or system-level innovations that enable high-throughput and automated workflows. Together, these innovative engineering advances mark aion toward more standardized, efficient production workflows.

The Singularity Countdown: AGI by 2029, Humans Merge with AI, Intelligence 1000x | Ray Kurzweil

Ray Kurzweil predicts humans will merge with artificial intelligence (AI) by 2045, resulting in a 1000x increase in intelligence and marking the beginning of a new era of unprecedented innovation, potentially transforming human life and society ## ## Questions to inspire discussion.

Preparing for AI Timeline.

🤖 Q: When should I expect human-level AI and what defines it? A: Human-level AI arrives by 2029, defined not by passing the Turing test (which only matches an ordinary person), but as AGI requiring expertise in thousands of fields and the ability to combine insights across disciplines.

🧠 Q: When will the singularity occur and what intelligence gain can I expect? A: The singularity happens by 2045 when humanity merges with AI to become 1000x more intelligent, creating a seamless merger where biological and computational thought processes become indistinguishable.

⚡ Q: How much change should I prepare for in the next decade? A: Expect as much change in the next 10 years as occurred in the last 100 years (1925−2025), with AGI and supercomputers by 2035 enabling merging with AI for 1000x intelligence increase.

Career and Economic Adaptation.

A 100-Year-Old Problem Solved? Scientists Discover How To Freeze Organs Without Cracking Them

The breakthrough approach could lead to successful, long-term organ transplants, bringing science fiction closer to becoming medical reality. Cryopreservation, the process of preserving biological tissues by cooling them to subzero temperatures, might sound like something out of science fiction.

Our BRLS Research Application, Fixation vs. Vitrification Reflection, Cryonics & Autism

In this epsiode of the Cryosphere chat we discuss:
● The research proposal we submitted to BRLS
● Why slow growth could be an existential risk to cryonics.
● Our review of the Fixation vs. Vitrification discussion.
● Why there are so many autistic cryonicists.

Links:
Fixation vs. Virtification Discussion: https://youtu.be/gvu8P9D6p0g?si=2KOSESeOndtVl33V
Biostasis Pacific Northwest: https://www.reddit.com/r/cryonics/comments/1ozxslv/announcin…northwest/
I’ll see ya later mom… Reddit post: https://www.reddit.com/r/cryonics/comments/1owgnk0/ill_see_ya_later_mom/
Cryosphere Discord: https://discord.gg/ndshSfQwqz

Cryosphere Chat ft. Emil Kendziorra — Tales from Biostasis 2025, Our Near Death Experiences

The gang catches up with Emil Kendziorra after the Biostasis 2025 conference at the European Biostasis Foundation. Watch it on YouTube here. Topics covered include:

• How to get a Tomorrow Bio ambulance in your hometown.
• Tomorrow Bio’s plan to collect brain samples to check ultra-structure preservation in its cryonics patients — and how it will respond to what it finds.
• What’s new and what’s next for Tomorrow Bio.
• Our near death experiences.

Links:
• Cryosphere Discord Server: / discord.
• Cryonics Subreddit: / cryonics.

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