Ethan Mollick Profile picture
Jan 24 4 tweets 2 min read
A fact that shows human achievement: Both the hottest & coldest places in the universe have been on Earth in the last decade

CERN’s Large Hadron Collider hit 9.9 trillion Fahrenheit. And an experiment at the Bremen Drop Tower got to 38 trillionths of a degree above absolute zero
For everyone writing “but maybe alien scientists are generating hotter/colder temperatures” - hopefully! But you may also want to read this thread on a depressing resolution to the Fermi Paradox.
For everyone mad about me using Fahrenheit: fine, it was 5.5 trillion degrees Celsius. Not sure how that makes the temperature any more comprehensible, but sure.

However, it is cool that you can bike between the hottest and coldest places in the universe in about two days.
Okay, now folks are complaining that I didn't use Kelvin. 5.5 trillion degrees Celsius is... 5.5 trillion degrees Kelvin. But the only good way to measure temperature is to use Newton's original scale 👇, which calibrated thermometers based on a nice bath.

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More from @emollick

Jan 22
To put the scale of the asteroid that killed the dinosaurs in perspective: it hit the Earth so hard that are likely bits of dinosaurs ON THE MOON!

And this paper shows that those chunks could have survived to now intact, testing it by actually shooting frozen fossils at targets.
But the asteroid likely did not wipe out an advanced dinosaur civilization... probably. (It is surprisingly hard to tell after 65 million years, even radioactive waste would decay away, and the continents themselves have shifted)
One other impact of the dinosaur-killing asteroid: it led indirectly to the Mayan Empire. Mayan cities were located within the 65M year old buried crater of that meteor because the impact changed the geology of the region, giving the area its cenote pools with rare fresh water.
Read 4 tweets
Jan 19
Its like a Buzzfeed quiz, but with real science: two papers show the movies and books you like can be used to accurately predict Big 5 personality traits. Take a look at the lists! (& some examples in the thread)
Movie paper: psyarxiv.com/wsdu8/download…
Books: arxiv.org/ftp/arxiv/pape…
Some examples:
🎥Wes Anderson movies predict high openness to experience
🎥Shrek Forever After predicts low openness to experience
🎥Corpse Bride predicts high neuroticism
🎥Studio Ghibli predicts introversion
📕Manga & Drizzt novels also predict introversion
In case you aren’t familiar with the Big Five (or OCEAN test), it is the current gold standard for personality testing, assessing you on extraversion, agreeableness, conscientiousness, negative emotionality and openness to experience. You can take it here: projects.fivethirtyeight.com/personality-qu…
Read 6 tweets
Jan 19
Reminder: Watch out for the whimper, not the bang.

"Historically, civilizational collapses are boring." Most apocalypses start as Boring Apocalypses, where decaying governmental capability & social dynamism lower our ability to stop risks & threats from turning into catastrophe. Image
I tweet about this paper occasionally because we dodged true catastrophe with COVID thanks to government and industry partnerships, as well as luck that the virus isn't worse.

But it was a near-run thing, and we aren't trying hard to fix what went wrong. researchgate.net/publication/32… Image
This time, fast adaption with government support saved us, for example:
💉Vaccines developed in record times!
🚗Car companies 80,000 ventilators in three months!
💻Quick moves to remote work!
But we were also failed by many institutions. Continued decay of those is a real threat.
Read 5 tweets
Jan 17
Showing the "right" emotions to other people is a cause of work stress, so I am sorry to tell you , but you should know that dogs, horses, and goats have all been proven to be able to read your facial expressions.

And they prefer it when you look happy. 🐶🐐🐴😬
Here are the papers. And one of the best illustrations of methods (the dog needs a lab coat to really complete the scene).

Dogs: sciencedirect.com/science/articl…
Horses: royalsocietypublishing.org/doi/pdf/10.109…
Goats: royalsocietypublishing.org/doi/pdf/10.109…
Read 6 tweets
Jan 12
A useful strategic framework for thinking about startups comes from the work of military strategist John Boyd. His OODA "loop" was developed to explain why some pilots won in air combat, but works as a profound mediation about dealing with uncertainty & using pacing to win 1/5
The basic idea is that, in combat, pilots go through repeated cycles of:
👁️Observation, gathering data
🧠Orientation, analysis of data, drawing on background & mental state
↔️Decision, choice of action to take
🎆Action, making a decision happen
Whoever does the loops faster, wins
Boyd argued that the loop applies to companies, too. If you can "get inside the OODA loop" of your competitor, you have the advantage. By the time they even notice a market is there, you have identified an opportunity, gathered data, tried an approach, and learned from mistakes.
Read 8 tweets
Dec 28, 2021
My favorite paper for reflecting on before the New Year asks the key question: how can we be happier?

The world's top happiness scholars ranked the best strategies for individual & societal happiness, here are results listed by feasibility & effectiveness link.springer.com/article/10.100…
Effective individual happiness strategies:
👨‍👩‍👧‍👦Invest in family & friends
💃🏻Join a club
🙏Practice religion, if applicable
🤹‍♂️Be mentally & physically active
🌲Experience nature
🛌Sleep

Low effectiveness:
🧹Declutter
👨‍💻Self-employment
🍃Become vegan
🖥Eliminate screens
🏡Own a home
A related thread on money and happiness 👇 (one worthwhile caveat is that, while more money always seems to increase happiness, the happiness provided by each additional dollar is less as people get wealthier)
Read 4 tweets

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