Mark Peifer (He, him)
@peiferlabunc.bsky.social
Cell adhesion, cytoskeletal regulation, Wnt signaling & wherever science leads us + wildflowers & my own idiosyncratic views. First gen college grad
Diversity, equity & Inclusion are core American Values
https://peiferlab.web.unc.edu
Diversity, equity & Inclusion are core American Values
https://peiferlab.web.unc.edu
Reposted by Mark Peifer (He, him)
*giggles in NC dummymander*
An 18-point shift from 2024 would put every district on the newly proposed Indiana map into play.
December 3, 2025 at 1:39 AM
*giggles in NC dummymander*
Reposted by Mark Peifer (He, him)
Boat in 15 September US airstrike in the Caribbean was not of Venezuelan origin as Donald Trump claimed. Formal complaint now filed over the death of Colombian fisher Alejandro Carranza Medina with US defense secretary Pete Hegseth named as the perpetrator. www.theguardian.com/world/2025/d...
Family of victim in Trump drug boat killings files first formal complaint
Exclusive: Petition says Colombia citizen Alejandro Carranza Medina was illegally killed in US airstrike on 15 September
www.theguardian.com
December 2, 2025 at 11:14 PM
Boat in 15 September US airstrike in the Caribbean was not of Venezuelan origin as Donald Trump claimed. Formal complaint now filed over the death of Colombian fisher Alejandro Carranza Medina with US defense secretary Pete Hegseth named as the perpetrator. www.theguardian.com/world/2025/d...
Damn--I'll be getting ready to give my final and won't be there till Sunday but I recommend this highly--I leanred so much from my mentor Maggie!
Another fabulous session coming up at the #cellbio2025 @ascbiology.bsky.social @embo.org meeting in Philly!
Looking forward to seeing you there!
Looking forward to seeing you there!
December 3, 2025 at 1:36 AM
Damn--I'll be getting ready to give my final and won't be there till Sunday but I recommend this highly--I leanred so much from my mentor Maggie!
Reposted by Mark Peifer (He, him)
Another fabulous session coming up at the #cellbio2025 @ascbiology.bsky.social @embo.org meeting in Philly!
Looking forward to seeing you there!
Looking forward to seeing you there!
December 2, 2025 at 10:33 PM
Another fabulous session coming up at the #cellbio2025 @ascbiology.bsky.social @embo.org meeting in Philly!
Looking forward to seeing you there!
Looking forward to seeing you there!
Reposted by Mark Peifer (He, him)
This is gonna be a kick-ass session!!
Another fabulous session coming up at the #cellbio2025 @ascbiology.bsky.social @embo.org meeting in Philly!
Looking forward to seeing you there!
Looking forward to seeing you there!
December 2, 2025 at 10:35 PM
This is gonna be a kick-ass session!!
Reposted by Mark Peifer (He, him)
Eel Facts Advent Calendar Time!!!!!!!!!!!!!!! My 10 year old is very happy about this.
Get yours from the @skypeascientist.bsky.social shop via @sarahmackattack.bsky.social
Get yours from the @skypeascientist.bsky.social shop via @sarahmackattack.bsky.social
December 3, 2025 at 1:08 AM
Eel Facts Advent Calendar Time!!!!!!!!!!!!!!! My 10 year old is very happy about this.
Get yours from the @skypeascientist.bsky.social shop via @sarahmackattack.bsky.social
Get yours from the @skypeascientist.bsky.social shop via @sarahmackattack.bsky.social
Reposted by Mark Peifer (He, him)
Last week, ICE arrested and separated a father and son after a routine check-in. Six-year-old Yuanxin had just enrolled in the first grade at an elementary school in Astoria. Now he's in custody, alone. ICE won't say where. This cruelty serves no one. It must end.
December 2, 2025 at 9:16 PM
Last week, ICE arrested and separated a father and son after a routine check-in. Six-year-old Yuanxin had just enrolled in the first grade at an elementary school in Astoria. Now he's in custody, alone. ICE won't say where. This cruelty serves no one. It must end.
Reposted by Mark Peifer (He, him)
Every moment when I wonder “what will it take?” I have to remind myself “the limit does not exist.”
here's Trump's full racist rant about MN's Somali community: "Somalians ripped off that state for billions. And they contribute nothing... Ilhan Omar is garbage. She's garbage. Her friends are garbage. These aren't people that work... They come from hell & do nothing but bitch. We don't want them"
December 3, 2025 at 12:09 AM
Every moment when I wonder “what will it take?” I have to remind myself “the limit does not exist.”
Reposted by Mark Peifer (He, him)
This alone is worth impeaching this administration over.
NEW: The official USCIS guidance on this pause is out. Until further notice from the USCIS Director, all immigration benefits (including citizenship) are indefinitely suspended for nationals of 19 countries, as are all affirmative asylum applications from nationals of any country.
December 3, 2025 at 1:03 AM
This alone is worth impeaching this administration over.
Reposted by Mark Peifer (He, him)
NEW: The official USCIS guidance on this pause is out. Until further notice from the USCIS Director, all immigration benefits (including citizenship) are indefinitely suspended for nationals of 19 countries, as are all affirmative asylum applications from nationals of any country.
![Page 3: Guidance
…
USCIS will conduct a thorough review on a case-by-case basis to assess benefit eligibility including whether:
1. The alien is listed in the Terrorist Screening Dataset (TSDS) as a Known or Suspected
Terrorist (KST) under Tier 1 or Tier 2 classifications or is included in Tier 3 or Tier 4 of the
TSDS with significant derogatory information related to the alien.
2. The alien is connected to prior, current, or planned involvement in, or association with, an activity, individual, or organization described in sections 212(a)(3)(A), (B), or (F), or 237(a)(4)(A) or (B) of the Immigration and Nationality Act (INA).
3. The alien is linked to prior, current, or planned involvement in, or association with, an activity, individual, or organization that may pose a risk of serious harm or danger to the community, including criminal conduct described in INA 101(a)(43), 212(a)(1)(A)(iii), 212(a)(2), 237(a)(2), or 237(a)(4)(A)(ii).
4. The alien is unable to establish their identity as outlined in PP 10949."'
This process ensures that USCIS exercises its full authority to protect national security and public safety while adhering to the provisions of the INA and applicable laws. USCIS has considered that this direction may result in delay to the adjudication of some pending applications and has weighed that consequence against the urgent need for the agency to ensure that applicants are vetted and screened to the maximum degree possible. Ultimately, USCIS has determined that the burden of processing delays that will fall on some applicants is necessary and appropriate in this instance, when weighed against the agency's obligation to protect and preserve national security.
Within 90 days of issuance of this memorandum, USCIS will prioritize a list for review, interview, re-interview, and referral to ICE and other law enforcement agencies as appropriate, and, in consultation with the [two other offices] issue operational guidance.](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:2vtbmhmrwzbqcfv4we4uxzzt/bafkreiflg3ofmvb5gya5mycqjtkvis6ltjx6n7j2bxd5basepl67uqtqay@jpeg)
December 3, 2025 at 12:46 AM
NEW: The official USCIS guidance on this pause is out. Until further notice from the USCIS Director, all immigration benefits (including citizenship) are indefinitely suspended for nationals of 19 countries, as are all affirmative asylum applications from nationals of any country.
Reposted by Mark Peifer (He, him)
New preprint! Do you like ocean waves? We found similar waves on bacterial colonies! We found that this collective behavior, known as rippling, is nothing but surface waves on an active nematic. @princeton.edu @mpipks.bsky.social @ub.edu @icreacommunity.bsky.social
www.biorxiv.org/content/10.1...
www.biorxiv.org/content/10.1...
December 2, 2025 at 8:02 PM
New preprint! Do you like ocean waves? We found similar waves on bacterial colonies! We found that this collective behavior, known as rippling, is nothing but surface waves on an active nematic. @princeton.edu @mpipks.bsky.social @ub.edu @icreacommunity.bsky.social
www.biorxiv.org/content/10.1...
www.biorxiv.org/content/10.1...
Reposted by Mark Peifer (He, him)
"I love Slate! Everything is so intuitive and seamless!!"
- No grad program director or program manager I've ever met...
For those who attempted to submit your apps to PhD programs and have gotten strange errors, my apologies for the added stress... Folks are working hard to resolve issues!! 🤞🏽
- No grad program director or program manager I've ever met...
For those who attempted to submit your apps to PhD programs and have gotten strange errors, my apologies for the added stress... Folks are working hard to resolve issues!! 🤞🏽
December 2, 2025 at 8:38 PM
"I love Slate! Everything is so intuitive and seamless!!"
- No grad program director or program manager I've ever met...
For those who attempted to submit your apps to PhD programs and have gotten strange errors, my apologies for the added stress... Folks are working hard to resolve issues!! 🤞🏽
- No grad program director or program manager I've ever met...
For those who attempted to submit your apps to PhD programs and have gotten strange errors, my apologies for the added stress... Folks are working hard to resolve issues!! 🤞🏽
Reposted by Mark Peifer (He, him)
Currently dorking out over this graph about child mortality with my brother. Just mind boggling to take in.
December 2, 2025 at 5:00 AM
Currently dorking out over this graph about child mortality with my brother. Just mind boggling to take in.
Reposted by Mark Peifer (He, him)
Summers conferred with Epstein frequently about how to extract sexual favors from a Harvard econ grad (AB '04, PhD '09)
The grad is from China
Epstein and Summers referred to her by the codename "Peril"
Racism and sexual exploitation in one efficient package
bit.ly/3LHpin8
The grad is from China
Epstein and Summers referred to her by the codename "Peril"
Racism and sexual exploitation in one efficient package
bit.ly/3LHpin8
As Summers Sought Clandestine Relationship With Woman He Called a Mentee, Epstein Was His ‘Wing Man’ | News | The Harvard Crimson
When former Harvard President Lawrence H. Summers was pursuing a romantic relationship with a woman he described as a mentee, he turned to a longtime associate for guidance: convicted sex offender Jef...
bit.ly
November 17, 2025 at 3:05 AM
Summers conferred with Epstein frequently about how to extract sexual favors from a Harvard econ grad (AB '04, PhD '09)
The grad is from China
Epstein and Summers referred to her by the codename "Peril"
Racism and sexual exploitation in one efficient package
bit.ly/3LHpin8
The grad is from China
Epstein and Summers referred to her by the codename "Peril"
Racism and sexual exploitation in one efficient package
bit.ly/3LHpin8
Reposted by Mark Peifer (He, him)
The AEA has imposed a lifetime ban on Lawrence H. Summers’ membership and participation in AEA activities. See the full statement here. www.aeaweb.org/news/aea-sta...
Statement from the American Economic Association
www.aeaweb.org
December 2, 2025 at 4:01 PM
The AEA has imposed a lifetime ban on Lawrence H. Summers’ membership and participation in AEA activities. See the full statement here. www.aeaweb.org/news/aea-sta...
Reposted by Mark Peifer (He, him)
This paper was written by my WormAtlas colleagues, Dave and Nate, in addition to 5 Nobel Prize winners. Hopefully more attention and funding will find its way to the invaluable C. elegans resources described in the paper.
A new paper, co-authored by WormAtlas directors Dave Hall and Nate Schroeder, describes how C. elegans community research resources, including WormAtlas, provide the infrastructure that supports nematode research around the world.
www.pnas.org/doi/10.1073/...
www.pnas.org/doi/10.1073/...
PNAS
Proceedings of the National Academy of Sciences (PNAS), a peer reviewed journal of the National Academy of Sciences (NAS) - an authoritative source of high-impact, original research that broadly spans...
www.pnas.org
December 2, 2025 at 7:06 PM
This paper was written by my WormAtlas colleagues, Dave and Nate, in addition to 5 Nobel Prize winners. Hopefully more attention and funding will find its way to the invaluable C. elegans resources described in the paper.
Reposted by Mark Peifer (He, him)
Revolutionary tracking study follows monarch butterflies to Mexico using groundbreaking technology and continent-wide collaboration monarchjointventure.org/blog/revolut...htt
Revolutionary tracking study follows monarch butterflies to Mexico…
Over 400 ultra-light transmitters deployed by over 20 partner organizations deliver unprecedented, individual-level view of monarch migration using…
monarchjointventure.org
December 2, 2025 at 6:38 PM
Revolutionary tracking study follows monarch butterflies to Mexico using groundbreaking technology and continent-wide collaboration monarchjointventure.org/blog/revolut...htt
Reposted by Mark Peifer (He, him)
Perhaps he fancies himself the SS ecretary of War?
A bit on the fascist nose, don't you think?
A bit on the fascist nose, don't you think?
December 2, 2025 at 7:08 PM
Perhaps he fancies himself the SS ecretary of War?
A bit on the fascist nose, don't you think?
A bit on the fascist nose, don't you think?
Reposted by Mark Peifer (He, him)
Richard so deserves this - a legend in bioinformatics and computational biology - work genome, human genome, Pfam, 1,000 genomes, Sam/bam format, bwa, vcf, psmc… and so many more
Congratulations to Richard Durbin on being awarded our Genetics Society Medal!
November 14, 2025 at 1:37 PM
Richard so deserves this - a legend in bioinformatics and computational biology - work genome, human genome, Pfam, 1,000 genomes, Sam/bam format, bwa, vcf, psmc… and so many more
Reposted by Mark Peifer (He, him)
Even if you accept the military cooption of double-tap it is defined everywhere as intentionally hitting rescuers (and wtf, right?) or additional combatants entering the fray. “Finishing off the incapacitated and wounded” doesn’t fit that.
December 2, 2025 at 4:58 PM
Even if you accept the military cooption of double-tap it is defined everywhere as intentionally hitting rescuers (and wtf, right?) or additional combatants entering the fray. “Finishing off the incapacitated and wounded” doesn’t fit that.
Reposted by Mark Peifer (He, him)
Once again the fucking media is carrying water for the right wing of this country. “Double tap strike”?? That is invented up bullshit to engorge the nether regions of the mouth breather gunnut and incel FPS gamer demographic. Stop it.
December 2, 2025 at 4:37 PM
Once again the fucking media is carrying water for the right wing of this country. “Double tap strike”?? That is invented up bullshit to engorge the nether regions of the mouth breather gunnut and incel FPS gamer demographic. Stop it.
Here is some data from the census--the time when my great-grandparents were immigrating was the peak of foreign born folks in the US (unless you include the initial colonization when it was 100%)
www.census.gov/library/work...
www.census.gov/library/work...
December 2, 2025 at 5:11 PM
Here is some data from the census--the time when my great-grandparents were immigrating was the peak of foreign born folks in the US (unless you include the initial colonization when it was 100%)
www.census.gov/library/work...
www.census.gov/library/work...
Reposted by Mark Peifer (He, him)
An important write up from the NYT on the funding changes at the NIH.
www.nytimes.com/interactive/...
www.nytimes.com/interactive/...
The U.S. Is Funding Fewer Grants in Every Area of Science and Medicine (Gift Article)
A quiet policy change means the government is making fewer bets on long-term science.
www.nytimes.com
December 2, 2025 at 11:51 AM
An important write up from the NYT on the funding changes at the NIH.
www.nytimes.com/interactive/...
www.nytimes.com/interactive/...
JFC--now our Medicare dollars are being used to sponsor ads for Dr. Oz--I had to look to make sure it wasn't satire
December 2, 2025 at 12:20 PM
JFC--now our Medicare dollars are being used to sponsor ads for Dr. Oz--I had to look to make sure it wasn't satire
Reposted by Mark Peifer (He, him)
Polygenic embryo screening is being marketed commercially – but how do IVF clinicians view it?
• General approval is low (12%)
For specific uses:
• 59% approved of health-related embryo selection
• 6% approved of trait-based selection
🧵 Survey findings in NPJ Genomic Medicine
• General approval is low (12%)
For specific uses:
• 59% approved of health-related embryo selection
• 6% approved of trait-based selection
🧵 Survey findings in NPJ Genomic Medicine
December 1, 2025 at 8:24 PM
Polygenic embryo screening is being marketed commercially – but how do IVF clinicians view it?
• General approval is low (12%)
For specific uses:
• 59% approved of health-related embryo selection
• 6% approved of trait-based selection
🧵 Survey findings in NPJ Genomic Medicine
• General approval is low (12%)
For specific uses:
• 59% approved of health-related embryo selection
• 6% approved of trait-based selection
🧵 Survey findings in NPJ Genomic Medicine