Tootfinder

Shopify joined Substack in October, the latest and the biggest company to do so and a sign that brands take Substack seriously as a marketing channel (Allison Smith/Modern Retail)
https://www.modernretail.co/marketing/shopify-jus…

Shopify just became the biggest company to launch a Substack newsletter
Shopify has launched a Substack newsletter called "In Stock," becoming the largest company on the platform.

Nike quietly sold its digital products subsidiary RTFKT on December 16 for an undisclosed sum, roughly one year after Nike shuttered the NFT unit (Matthew Kish/Oregonian)
https://www.oregonlive.com/business/2026/01/n…

Nike sells RTFKT: Digital products subsidiary quietly offloaded in December
The sale comes as CEO Elliott Hill refocuses Nike on sports and questions persist about Converse’s future after a 30% sales drop.

Zelensky reports 'long and substantive call' with Witkoff, Kushner: https://benborges.xyz/2025/12/06/zelensky-reports-long-and-substantive.html

Barnard's mysterious star near Venus - a strange interloper noted during a satellite search: #Barnard misjudged) -> Mistério de 130 Anos Resolvido - A Verdade Sobre a Estrela Fantasma de Barnard: https://spacetoday.com.br/misterio-de-130-anos-resolvido-a-verdade-sobre-a-estrela-fantasma-de-barnard/

(IEEE Spectrum flashback, 2004) Sight for sore ears - Dutchman develops auditory imager for the blind https://spectrum.ieee.org/sight-for-sore-ears

Sight for Sore Ears
Dutchman develops auditory imager for the blind

Maybe Rutte should talk to his daddy.
https://phillipspobrien.substack.com/p/the-new-us-national-security-strategy?r=1tgexa&utm_medium=ios&triedRedirect=true

The New US National Security Strategy
Trump Says Openly That the US Wants to Dominate Europe and Make it MAGA

Kvällens drink till #drinkklubben - Hanky Panky. Smakar som en snällare Fernet. Min typ av drink! Varken söt eller sur utan bara smakstark.

BJ Pryor is a professional Ben Franklin impersonator. Every day he distributes one of Franklin's writings. Today: Franklin reports on seeing "from the terrace of my house near Paris, the first flight through the air by human beings", and meets Montgolfier!
https://bjpryor.substack.com/p/flight

Flight!
Kind Reader,

The high order spectral radius of graphs without long cycles or paths
Yuntian Wang, Lizhu Sun, Changjiang Bu
https://arxiv.org/abs/2510.04461 https://arxiv…

The high order spectral radius of graphs without long cycles or paths
In 1959, Erdős and Gallai established two classic theorems, which determine the maximum number of edges in an $n$-vertex graph with no cycles of length at least $k$, and in an $n$-vertex graph with no paths on $k$ vertices, respectively. Subsequently, generalized and spectral versions of the Erdős-Gallai theorems have been investigated. A concept of a high order spectral radius for graphs was introduced in 2023, defined as the spectral radius of a tensor and termed the $t$-clique spectral rad…

a16z announces an eight-week new media fellowship for people with a record of creating "impactful content" via newsletters, podcasts, communities, and more (a16z)
https://a16z.substack.com/p/introducing-the-a16z-new-media-fellowship

Introducing the a16z New Media Fellowship
A new 8-week program for operators, creators, & storytellers shaping the future of media