Robert Kaindl

In the 1940s, Subrahmanyan Chandrasekhar was committed to his teaching role at the University of Chicago, despite being based at the Yerkes Observatory. Each week, he traveled 80 miles to teach a special course attended by only two students. The students were Tsung-Dao Lee and Chen-Ning Yang. They proved their mentor's faith was well-placed when they both won the Nobel Prize in Physics in 1957, years before Chandrasekhar received the same honor in 1983. Remarkably, this course went down in history as the only one where every attendee received a Nobel Prize, underscoring the extraordinary impact of Chandrasekhar's dedication and teaching. 📷 AIP Emilio Segrè Visual Archives, Physics Today Collection

It is time for the United States Postal Service to ban junk mail. Unsolicited spam calls are already prohibited by the FCC. Emails are heavily regulated by the CAN-SPAM Act of 2003. Junk mail is the majority of mail, 100 million trees per year. Enough!

.@SecretaryWright highlights the critical role of @ENERGY’s National Labs and the world-class scientists across all 17 labs driving the next generation of American research and innovation.

A cat co-authored a scientific paper in 1975, when his owner, a physicist named Jack H. Hetherington, decided to add him as a second author to avoid changing the plural pronouns in his manuscript. The cat’s name was Chester, and he was given the pen name F.D.C. Willard, which stood for Felix Domesticus, Chester. Willard was also the name of Chester’s father. The paper was about atomic behavior at different temperatures, and it was published in Physical Review Letters, a prestigious physics journal. Chester’s co-authorship was revealed when Hetherington sent some signed copies of the paper to his friends and colleagues, and included the cat’s paw prints as his signature. The story became widely known and amused many people in the scientific community. Chester even published another paper as the sole author in 1980, in a French popular science magazine. He died in 1982, but he is still remembered as the first and only cat to have authored a published scientific paper.

"We are like butterflies who flutter for a day and think it's forever." - Carl Sagan, in Cosmos (1980)

Map showing air traffic in 1899.

Kibo means 'hope' in Japanese. I brought this module to the space station on my first mission as shuttle commander back in 2008. This is a replica for training, but the real Kibo is still up there doing great work. Pretty cool.

Quantum mechanics over real numbers fully reproduces standard quantum theory arxiv.org/abs/2604.19482

Pope Leo's Easter message: "Let those who have weapons lay them down! Let those who have the power to unleash wars choose peace! Not a peace imposed by force, but through dialogue! Not with the desire to dominate others, but to encounter them!"

If you’re just arriving at #APSSummit26, Big Blue Bear is here to welcome you. 🐻⛰️ A big week ahead with scientific sessions, networking, and plenty of fun mixed in. Check out today’s schedule and let us know what you're most excited to see: go.aps.org/4bbskub

Take a (very) quick stroll through the #APSSummit26 Exhibit Hall for a taste of what it has to offer. Hint: It includes a claw machine. 🕹️

🔬 Researchers gathered in Ottawa for the NSF X-lites Incubator Workshop: Structured Light at High Intensity. Over two days, teams explored new directions in structured-light science and launched collaborative pathfinder projects. 🔗opticalscience.osu.edu/news/structure…

Today we honour the legacy of Anthony Leggett whose pioneering insights reshaped our understanding of quantum phenomena and macroscopic scales. He passed away on Sunday at the age of 87. He was among the first to propose that superconducting systems at very low temperatures could exhibit macroscopic quantum tunneling – a theoretical prediction that later inspired and guided the very experiments recognised by the 2025 physics prize. Leggett was awarded the 2003 Nobel Prize in Physics and his work continues to influence modern quantum research and remains foundational to the field today.

From Gorsuch concurrence.

“Strong public universities lead to student success, and when students succeed, the state succeeds.” At his confirmation hearing, Regent McCain shared how he will work to ensure students, especially from rural, tribal and veteran backgrounds, succeed at @ASU, @NAU and @UArizona.

Imagine voluntarily doing this to your own country

NEW: The Minnesota Chamber of Commerce released this letter on behalf of more than 60 CEOs of Minnesota-based companies today. mnchamber.com/blog/open-lett…

I am ending my campaign for Minnesota Governor. I describe why in the below video. Please watch until the end. (It is 10 minutes, 52 seconds.) Thank you, Chris

Today, I call on the heads of ICE, CBP, and USCIS to testify before the Homeland Security Committee.