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Paul Knoepfler @stemcells.bsky.social · 05/10/2026

Morning. Took this yesterday early on at Lake Solano County Park, about 20 miles to the West

Paul Knoepfler @stemcells.bsky.social · 27/09/2026

Only 4 days left to try to win $200 in our iPS cell 20th anniversary contest. Almost anyone can enter including faculty (even Yamanaka) ipscell.com/2026/09/cele... #stemcells #stemcell

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Paul Knoepfler @stemcells.bsky.social · 26/09/2026

Early morning birding at Putah Creek Riparian @ucdavis.bsky.social got a lifer. Chestnut-sided warbler. Very unusual bird for this area. Hanging out with about a dozen other warblers

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Paul Knoepfler @stemcells.bsky.social · 16/09/2026

Amid patient deaths and adverse events Japan needs to tackle its unproven regenerative clinics ipscell.com/2026/09/amid... #stemcells #stemcell Some researchers there are rightly pushing for change

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Paul Knoepfler @stemcells.bsky.social · 24/08/2026

Could be a red-breasted nuthatch irruption around Davis, CA this fall. Saw 1-2 at Putah Creek South Fork this morning

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Paul Knoepfler @stemcells.bsky.social · 20/08/2026

ICYMI: Article on longevity & David Sinclair provides new insights including into the driving factors for him but has issues such as re: science history of reprogramming and MYC ipscell.com/2026/08/arti... More generally, does longevity space lack altruism as a key driver?

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Paul Knoepfler @stemcells.bsky.social · 09/08/2026

Sunrise nature pics from Putah Creek (Fun thing is that "Green River" by CCR was about Putah Creek.) Otter family were snarfing so many crawdads

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Paul Knoepfler @stemcells.bsky.social · 05/08/2026

Midweek #stemcell & regenerative medicine news: another FDA warning & Florida state stem cell law problems already, bigger concerns about many such state laws, non-independent FDA ipscell.com/2026/08/midw... #stemcells

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Paul Knoepfler @stemcells.bsky.social · 04/08/2026

ICYMI: Florida anti-FDA stem cell law is already a big mess ipscell.com/2025/05/upco... Many clinics & suppliers acting like it's a gold rush, ignoring FDA non-compliance, plus some operating outside limited scope of even FL state law. People will get hurt and ripped off by some clinics

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Paul Knoepfler @stemcells.bsky.social · 24/07/2026

PCAC finally finds a peptide it doesn't love: narrowly emideltide is not recommended for compounding. Maybe RFK Jr. doesn't care about this one? Slightly different version of the panel voted on this one, which likely explains "no" vote.

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Paul Knoepfler @stemcells.bsky.social · 22/07/2026

Blast from the past, which is starting to feel like ancient history. Ring any bells for anyone else? Microarray days...

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Paul Knoepfler @stemcells.bsky.social · 19/07/2026

This sunflower was a hotbed of activity. See the crab spider at 12 o'clock hunting bees and the ladybug at 5 o'clock. Other insects too. Anyone know if this kind of spider can eat ladybugs?

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Paul Knoepfler @stemcells.bsky.social · 10/06/2026

This feels like such a Yolo County news item

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Paul Knoepfler @stemcells.bsky.social · 02/05/2026

Tonight before sunset heard a bird call in my backyard I didn't recognize. Turns out it was a baby California Towhee calling for its parent. Also tiger swallowtail #birding

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Paul Knoepfler @stemcells.bsky.social · 26/04/2026

Went birding early this morning at a nature area for 2 hrs. Coolest birds were in the parking lot of course LOL. A pair of hooded orioles.

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Paul Knoepfler @stemcells.bsky.social · 25/04/2026

A few interesting birds early this morning: Olive-sided flycatcher and Black-headed Grosbeak

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Paul Knoepfler @stemcells.bsky.social · 18/04/2026

Western Tanager (pink head) vs. Bullock's Oriole (the more orange one). Who wins?

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Paul Knoepfler @stemcells.bsky.social · 16/04/2026

Kennedy unbanned the unproven peptides today. These are just drugs with no good data.

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Paul Knoepfler @stemcells.bsky.social · 15/04/2026

In light of the news today FDA under RFK Jr. is moving to unban unproven peptides via the compounding advisory committee, it's still very odd that the DOJ just indicted someone related to many of these same peptides ipscell.com/2026/04/land...

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Paul Knoepfler @stemcells.bsky.social · 10/04/2026

ICYMI: Landmark fed indictment of clinic doc related to allegations on clinical use of popular "wellness" peptides like BPC-157, GHK, etc. ipscell.com/2026/04/land... Interesting timing as RFK Jr may make the FDA un-ban some of these soon

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Paul Knoepfler @stemcells.bsky.social · 09/04/2026

Landmark federal indictment for pop peptides alleged 'scheme' even as RFK Jr. may un-ban some ipscell.com/2026/04/land... #bpc157

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Paul Knoepfler @stemcells.bsky.social · 23/03/2026

ICYMI: FDA is investigating a death related to use of an unapproved placental extract. A Russian student and health influencer also died from this extract ipscell.com/2026/03/fda-... There is worry that wellness trends promoting unproven stuff like these extracts & peptides will lead to more deaths

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Paul Knoepfler @stemcells.bsky.social · 11/03/2026

ICYMI: More on Church & Epstein, how simple "no" could have been, making amends? ipscell.com/2026/03/more... Woody Allen b-day party invite is striking. Should Church pay back to a charity what he got from Epstein? @phylogenomics.bsky.social

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Paul Knoepfler @stemcells.bsky.social · 11/03/2026

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Paul Knoepfler @stemcells.bsky.social · 19/02/2026

From Skin Biopsy to iPS cell Proposals: Epstein files Emails Involving George Church’s Personal Genome Project and Jeffrey Epstein ipscell.com/2026/02/from... #stemcells #epsteinfiles

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Paul Knoepfler @stemcells.bsky.social · 17/02/2026

Great epigenomics and chromatin meeting come up in the Bay Area. Check it out!

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Paul Knoepfler @stemcells.bsky.social · 16/02/2026

I find it amusing that even the staid sport of curling can have controversy at this Olympics

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Paul Knoepfler @stemcells.bsky.social · 28/01/2026

In support of the Roman Reed Spinal Cord Injury Research Act ipscell.com/2026/01/in-s... #stemcells #stemcell

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Paul Knoepfler @stemcells.bsky.social · 25/01/2026

Fun to get some pics of a Tropical Kingbird here in Sacramento, a bird that's usually in Mexico and southern Arizona

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Paul Knoepfler @stemcells.bsky.social · 19/01/2026

This has never felt more important than today. Doing & saying even small positive things makes a difference in difficult times

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Paul Knoepfler @stemcells.bsky.social · 03/01/2026

I'm planning to write more about this unproven & unapproved gene therapy (oligo-based) widely marketed in the US by clinics. I don't see how the FDA hasn't acted on the US clinics selling SOT therapy or Q-REstrain here ipscell.com/2024/03/us-c...

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Paul Knoepfler @stemcells.bsky.social · 01/01/2026

ICYMI: Colossal Biosciences wins 2025 The Screamers Award for science hype on incorrect dire wolf de-extinction claim ipscell.com/2025/12/colo... #stemcells #genetics

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Paul Knoepfler @stemcells.bsky.social · 25/12/2025

Red-shouldered hawk. Love the wing pattern

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Paul Knoepfler @stemcells.bsky.social · 13/12/2025

Random observation of the week. I found these 23-year-old rolls of lab tape in a plastic bag tucked into a binder in going through some old stuff. They still work perfectly despite being older than the undergrads in my lab

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Paul Knoepfler @stemcells.bsky.social · 09/11/2025

Amazing pair of phainopepla calling to each other during the sunrise

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Paul Knoepfler @stemcells.bsky.social · 31/10/2025

The cover of the Korean edition of my and my daughter's How to Build a Dragon book looks cool #CRISPR #stemcells www.amazon.com/How-Build-Dr...

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Paul Knoepfler @stemcells.bsky.social · 24/10/2025

Pistache trees putting on shows now in Davis, CA

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Paul Knoepfler @stemcells.bsky.social · 19/10/2025

2 more recent birds: fairly common around here in fall but still showy, Spotted Towhee and relatively rare, dramatic Phainopepla

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Paul Knoepfler @stemcells.bsky.social · 18/10/2025

Red-shouldered hawk at sunrise in Davis, CA

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Paul Knoepfler @stemcells.bsky.social · 05/10/2025

I found this big one on our tomato plants a few years back.

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Paul Knoepfler @stemcells.bsky.social · 17/09/2025

Hiking & birding up in Yosemite. Despite the smoke, saw 3 lifers. Williamson sapsucker, White-headed woodpecker and a flock of Band-tailed pigeons. The Williamson was so cool! Smoke not so much.

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Paul Knoepfler @stemcells.bsky.social · 11/09/2025

Woman dies after unproven regenerative medicine (adipose "stem cells") at clinic in Japan ipscell.com/2025/09/woma... both US and Japanese oversight systems are discussed and need improvement #stemcells #stemcell

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Paul Knoepfler @stemcells.bsky.social · 10/09/2025

Valley Carpenter Bee (Xylocopa sonorina) covered in pollen on a passionflower. It's been a great year for passionfruit

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Paul Knoepfler @stemcells.bsky.social · 07/09/2025

Weekend #stemcell & regenerative reads: immunosuppression & brain cell therapies including for Parkinson's, big pharma sucking up to Trump, NK cells ipscell.com/2025/09/week... #stemcells

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Paul Knoepfler @stemcells.bsky.social · 10/08/2025

Just hanging out on a Sunday morning with my pal watching the crazy birders walk by

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Paul Knoepfler @stemcells.bsky.social · 25/07/2025

ICYMI: Q&A with the doc who gave RFK Jr. stem cells including on the FDA, his clinic offerings, & arena’s future ipscell.com/2025/07/qa-w... #stemcells #stemcell

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Paul Knoepfler @stemcells.bsky.social · 13/07/2025

Fun variety of tomatoes from the garden. The green-blue ones have a hint of berry flavor

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