M . Leandro Heien (@mlheien) header
M . Leandro Heien (@mlheien) profile picture

Natural philosopher, Tar Heel bred, The University of Arizona. The views expressed here are my own. After 20 years, I'll still grieve.

Tucson, AZ
Joined June 2013
Photo by M . Leandro Heien (@mlheien)Photo by M . Leandro Heien (@mlheien)Photo by M . Leandro Heien (@mlheien)Photo by M . Leandro Heien (@mlheien)Photo by M . Leandro Heien (@mlheien)Photo by M . Leandro Heien (@mlheien)Photo by M . Leandro Heien (@mlheien)Photo by M . Leandro Heien (@mlheien)Photo by M . Leandro Heien (@mlheien)
With a heavy heart, I share that my best friend, Poppy, passed away. Born: June 1, 2023. Adopted: August 18, 2023. Died: July 10, 2026. She was the best companion I could have asked for. I will add to this thread later, for me the grief is still too near. Requiescat in pace, Poppy. #RIPPoppy
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M . Leandro Heien retweeted
Space jellyfish alert! The USSF-432 rocket launch from California on November 2, 2026 at 5:42 PM PST could produce a space jellyfish. This occurs when a rocket and its expanding exhaust plumes are illuminated by the sun and observers are in local darkness. NOTE: This launch has a 240-minute window; this forecast is for a 5:42 PM PST launch. A later liftoff will materially change this forecast. The rocket will enter sunlight 02m37s after launch. Viewing locations, peak elevation while rocket is lit by the sun, and approximate viewing direction: 🟢 Los Angeles • 31° • SW 🟢 Modesto • 9° • SSE 🟡 Hermosillo • 19° • WSW 🟡 Phoenix • 13° • SW 🟡 Culiacán • 15° • WSW 🔴 Ciudad Juárez • 7° • WSW 🔴 Tepic • 9° • W See a detailed prediction for your location: jellyfish.johnkrausphotos.co… Information as of 2026-10-31 22:25 UTC. Forecast does not model real-time weather, cloud cover, or atmospheric conditions.
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On the way to the Suns game
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Many of you are in the process of applying for jobs in academia and/or in industry. As you prepare your job talks, consider giving it the following structure: First, a short snippet of your overall set of technical accomplishments. For instance, you might spend the first 15 minutes giving short overviews of a few of your works/papers - it's also very good to draw a theme across them if there is one. Second, you can spend the next 20-25 minutes doing a deep dive on *just one* of them - say, the one you're most proud of, or the one that matches the team/department interests and needs best. Finally, use the last 5-10 minutes to summarize and talk about what you think are important new directions to pursue in research and how these could have impact on the field, the company, or the department and their areas of interest and growth. It's hard to give a bad talk that's structured this way.
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Arizona's Daylight Saving Time checklist: Nothing = ✔️ WHY AZ DOESN'T OBSERVE DST:
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Arizona’s clocks never change
Tomorrow is the darkest morning of the ENTIRE year for about 200 million Americans... It’s the last morning before clocks fall back, so sunrises are later than they’ll be at any point this winter. Arizona, meanwhile, remains unbothered by any of these Daylight Savings posts as none of this applies to them.
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Side chains on the cell grip the toxin like a key a magic bullet Paul Ehrlich, 1908 Nobel Prize in Physiology or Medicine, shared with Ilya Mechnikov, for work on immunity. #nobelhaiku
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Light split into arms fringes hold still as Earth turns no ether to drift Albert A. Michelson, 1907 Nobel Prize in Physics, for his optical precision instruments and spectroscopic measurements. #nobelhaiku
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Oil of pine and peel ten carbons curl into rings scent given structure Otto Wallach, 1910 Nobel Prize in Chemistry, for his pioneering work on alicyclic compounds. #nobelhaiku
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Want advice on your aims page? Pull the study section’s past 3 rosters and have claude read all their publications/websites and create a profile for each with special attention to standing members. Then call a group of agents that mirror each one’s perspectives. Teach them the NIH scoring rules and have them critique your page. Highlight common faults and strategize on how to please as many as possible. Wash, rinse, repeat. Then do it again on GPT.
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Our K-12 crisis summed up: In 2020, University of CA San Diego had 32 freshman placed in the remedial "middle school math" section. By 2025, it was 665 students.
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JUST IN: 🇺🇸 $1.8 trillion wiped out from the US stock market today.
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🚨URGENTE - Lula sancionou lei que pode retirar até R$ 16,6 bilhões da saúde e da educação em 2027
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Intel $INTC has crashed -30% today, wiping out $100,000,000,000. Hey @grok, has the AI bubble burst?
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Closing out October with 1️⃣5️⃣ teams from @ASU, @NAU and @UArizona earning Top 25 rankings🏆
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Breaking news: The president of Baltimore City Community College is resigning at the end of December. Enrollment at the two-year college has declined for nearly 20 years and a recent state audit raised questions about BCCC's financial practices. thebanner.com/education/high…
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A massive multi-agency traffic enforcement operation led to hundreds of stops and citations in the Oro Valley area. Link in bio.
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Wikipedia is the largest encyclopedia ever written by humans—and it is likely to hold that title for ever. (Any future rival is sure to be made with the help of AI) bit.ly/4iO1Sum Illustration: Carl Godfrey
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I have not drunk water in the last 48 years — Billionaire Warren Buffett Billionaire investor Warren Buffett has reportedly gone nearly five decades without drinking water, with his preferred beverage being Cherry Coke, according to fellow billionaire Bill Ackman. Ackman, founder and CEO of Pershing Square, shared the surprising revelation during an appearance on the Equity Mates Investing podcast. Recalling a dinner Buffett had at his home years ago, Ackman said he had stocked up on Cherry Coke, knowing it was the legendary investor’s favourite drink. While they were at the dining table, Ackman offered Buffett still or sparkling water, but the 96-year-old declined and requested his usual soda instead. Curious about his drinking habits, Ackman asked, “Don’t you drink water?” According to him, Buffett replied, “Bill, I haven’t had water in 48 years.” Buffett, who stepped down as Berkshire Hathaway’s CEO last December after six decades in the position and relinquished his chairmanship in September, is famously known for consuming about five cans of Coca-Cola daily. In 2015, he jokingly described himself as “one-quarter Coca-Cola,” explaining that the beverage accounted for roughly 25 per cent of his daily calorie intake. Beyond soda, Buffett is known for his preference for fast food and sugary treats, including McDonald’s, hot dogs, fries, popcorn, cookies, sweets and ice cream.
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