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Done, enjoy! I posted links to his web site instead of Sotheby’s. Even though his web site is a little broken, it had much more detail on the technical process, which I think HN will appreciate.

https://news.ycombinator.com/item?id=49298723

Greg A Dunn, neuroscientist turned artist, uses microetching to encode time as a third dimension in his artwork. This piece ”Self reflected” is a depiction of the flow of signals in the human brain, which come to live as you shine light on it from varying directions. I have a copy on my wall and it’s mesmerizing.

His website unfortunately lacks a single landing page for this artwork. Don’t miss the other sections:

Videos: https://www.gregadunn.com/self-reflected/videos/

Images: https://www.gregadunn.com/self-reflected/self-reflected-gall...

The art and the concept: https://www.gregadunn.com/self-reflected/the-art-of-self-ref...

The neuroscience: https://www.gregadunn.com/self-reflected/the-neuroscience-be...

The engineering: https://www.gregadunn.com/self-reflected/the-engineering-beh...

And of course all his other art.

Related: ”Self Reflected” by neuroscientist and artist Gregg Dunn, https://www.sothebys.com/en/articles/self-reflected-a-giant-...

He uses the third dimension to encode time, so that you get an image of the brain that illustrates how signals propagate dynamically between brain regions.

I have a version of this on my wall and its mesmerizing to look at with the right lighting conditions

This seems to be the original:

https://s3.amazonaws.com/b2icontent.irpass.cc/2660/rl168199....

(via CBS News: https://www.cbsnews.com/news/truth-api-trump-media/)

So it seems to be precisely as nefarious as BBC reported.

My group published a cell atlas of the developing human brain in 2023, giving gene expression in single cells from postconception week 5 to 13. It’s on github: https://github.com/linnarsson-lab/developing-human-brain

The NIH BRAIN initiative is working on the next generation of that, covering more timepoints and better spatial data.

He was not head of state when the crime was committed and he is not head of state now.

If, like me, you wanted to see the actual farthest distance photo, here it is: https://beyondrange.wordpress.com/

The average federal tax rate is 14%, and the USAID budget was about 0.8% of the federal budget, so you’ve been paying about a 0.1% tax to fund USAID.

A much more detailed and thoughtful (and peer reviewed) take on the same question from my colleague Jussi Taipale: https://www.embopress.org/doi/full/10.15252/embj.201696114

Cool! Has anything similar been attempted in tumor tissue, given the many claims of microbes in tumors? Especially tumors not in contact with the exterior.

And further down: ” Contributions

J.J. and D.H. led the research. J.J., R.E., A. Pritzel, M.F., O.R., R.B., A. Potapenko, S.A.A.K., B.R.-P., J.A., M.P., T. Berghammer and O.V. developed the neural network architecture and training. T.G., A.Ž., K.T., R.B., A.B., R.E., A.J.B., A.C., S.N., R.J., D.R., M.Z. and S.B. developed the data, analytics and inference systems. D.H., K.K., P.K., C.M. and E.C. managed the research. T.G. led the technical platform. P.K., A.W.S., K.K., O.V., D.S., S.P. and T. Back contributed technical advice and ideas. M.S. created the BFD genomics database and provided technical assistance on HHBlits. D.H., R.E., A.W.S. and K.K. conceived the AlphaFold project. J.J., R.E. and A.W.S. conceived the end-to-end approach. J.J., A. Pritzel, O.R., A. Potapenko, R.E., M.F., T.G., K.T., C.M. and D.H. wrote the paper.”

These cells won’t divide because they will fail to replicate their DNA due to the lack of thymidine. The use case is cell therapies, where you give the patient cells grown in the lab but you don’t want those cells to potentially divide and cause cancer. For example, CAR T therapy to treat cancer, or dopaminergic neuron replacement therapy for Parkinson’s disease.

TERT activation is one of the most common alterations causing cancer. In fact, the whole point of the normally very low TERT expression in somatic cells is likely to be cancer prevention. It’s the mechanism behind the Hayflick limit, which puts a bound on the max number of divisions a cell can go through, via telomere shortening. Without such a limit, you get cancer. I highly doubt it will make you live longer.

Freezing and thawing organoids is not new, it’s fairly routine. The frozen piece of brain from an epilepsy patient doesn’t retain ”normal function”. There is no evidence in the paper that it integrates into neuronal circuits (this was not even tested), or supports anything like normal neuronal firing. The cells are alive, yes, and likely highly abnormally perturbed.

”The Emperor of all Maladies” by Siddhartha Mukherjee is fantastic

Related: Dijkstra, ”Why numbering should start at zero”

https://www.cs.utexas.edu/users/EWD/transcriptions/EWD08xx/E...

No that would be amazing. But we don’t have the technology to map all the connections in large mammalian brains. It was done in the fruitfly just this year: https://www.science.org/doi/10.1126/science.add9330

None, that was done 100 years ago, e.g. by Ramon y Cajal (Nobel prize 1906). But microscopic detail does not give molecular detail. What these current studies add is data on gene expression (mRNA molecules), chromatin accessibility (related to gene regulation), electrophysiology (in some cases), etc. We need such detail to connect disease genes inferred from genetics to specific brain cell types, for example.

Papers are paywalled but most can be found on bioRxiv, e.g. https://www.biorxiv.org/content/10.1101/2022.10.12.511898v1

That’s a terrible summary. A better overview by the Science editor: https://www.science.org/doi/full/10.1126/science.adl0913

The full collection of papers is linked here (my group led two, and contributed to four more): https://news.ycombinator.com/item?id=37878935

They are paywalled, but most are available as preprints on bioRxiv, e.g. https://www.biorxiv.org/content/10.1101/2022.10.12.511898v1

Yes, but at the same time most inbred strains have genetic disorders precisely because they are inbred. E.g. the most commonly used strain C57BL/6 develops age-related hearing loss. To avoid this, there are other lab strains like CD-1, which are deliberately bred to maintain a controlled level of genetic heterogeneity.

Salmon and cod are both delicious.

Boston Globe did a long, thoughtful writeup of the whole affair a while ago, for those interested in more nuance.

https://apps.bostonglobe.com/metro/investigations/spotlight/...

John PA Ioannidis, one of the authors of that paper (which is from 2018 btw) has published an average of 60 papers per year for the last decade, and more than 1100 in total (https://pubmed.ncbi.nlm.nih.gov/?term=Ioannidis+JPA&filter=d...). I’m pretty sure he doesn’t even have time to read most of his own papers.

Some observations in support, by researchers at Yale: https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4167193

I have this glass sphere model of the universe [1] showing galaxies as tiny bubbles. It’s beautiful and humbling (it represents about 1/100 of the observable universe).

[1] https://www.cinks-labs.de/products/the-universe-in-a-sphere?...