Gavin Koh

Medical researcher

[Gavin Koh @gavinkoh]

@albertoortegana Eczéma herpeticum

[Gavin Koh @gavinkoh]

@drkeithsiau Median sternotomy scar following prior cardiac bypass surgery some years ago

[Massimo @Rainmaker1973]

A recent study suggests that water exists as two distinct liquids rather than a single uniform substance.

Physicists have long hypothesized that water possesses a hidden dual nature at the molecular level. Confirming this idea has proven challenging because water molecules rearrange rapidly. An international research team has now provided the strongest evidence to date using unsupervised artificial intelligence techniques.

The analysis reveals that liquid water consists of a dynamic mixture of two structural forms. One is a dense disordered high density liquid or HDL. The other is a more open ordered low density liquid or LDL. These configurations continuously interchange at the molecular scale.

This internal switching explains many of water unusual properties. For example unlike most liquids water reaches maximum density at 4 degrees Celsius and expands upon further cooling which allows ice to float.

By clarifying these molecular dynamics the research advances understanding of water behavior under extreme conditions and its critical role in maintaining thermal stability essential for life on Earth.

[Li, L., & Zeng, X. C. (2026). Evidence for the generic existence of two local structures in liquid water. Nature Physics]

[Gavin Koh @gavinkoh]

Found under seat 17E on flight FR964 leaving Stansted Airport 10:50 on 5 Jul 2026. Given to crew member Natalia if anyone is looking for it #ryanair

[Gavin Koh @gavinkoh]

@TrackYourHeart Seizures

[Gavin Koh @gavinkoh]

@drkeithsiau Lung fluke paragonimus

[Gavin Koh @gavinkoh]

@drkeithsiau This is not a blood film…

[Gavin Koh @gavinkoh]

@DesignSemo Beautiful photo!

[Gavin Koh @gavinkoh]

@drkeithsiau Like to many things from XKCD, it contained a kernel of truth. Sterne explained 25 years ago why p-values are nonsense https://t.co/H3lj9cQwJU

[Matt Johansen @mattjay]

🧵 THREAD: A federal whistleblower just dropped one of the most disturbing cybersecurity disclosures I’ve ever read.

He's saying DOGE came in, data went out, and Russians started attempting logins with new valid DOGE passwords

Media's coverage wasn't detailed enough so I dug into his testimony:

[Roman Sheremeta 🇺🇸🇺🇦 @rshereme]

Former President of Poland Lech Wałęsa wrote the following letter to Donald Trump:

1/n

[Seth Abramson @SethAbramson]

As chilling a meme as I have seen. But I agree.

[Neil Stone @DrNeilStone]

Because of anti vaccine sentiment, the British government commissioned an enquiry into whether vaccination was safe and effective.

They found that it was (of course).

In 1896

Now, nearly 130 years on, RFK Jr and colleagues want to do the same.

The findings will be the same

[Neil Stone @DrNeilStone]

Jury is still out on whether vaccines work

I mean let's look at rubella

Tough isn't it? Stats and data can be so confusing

Guess we'll never know

[Knowledge & History @xKnowledgeBANK]

Wild Things from the Past- A Thread 🧵

1. 1920s toaster
https://t.co/6qq82Futth

[Colin Gorrie @colingorrie]

“Hello” is one of the most basic words in the English language.

But we have no records of it existing before 1826 — so how did “hello” become the default greeting in English?

As it turns out, it’s all thanks to one man…

[𝗡𝗶𝗵𝗮𝗿 𝗗𝗲𝘀𝗮𝗶 MD, DM @nihardesai7]

Great job, @PMOIndia 👏🏼

#MedTwitter

[Gavin Koh @gavinkoh]

@jazzcarito yes

[Gavin Koh @gavinkoh]

My book has been nominated for the Singapore Literature Prize! Agak-agak Chukop Rasa https://t.co/5rAf7ecEsE

[Ethan Mollick @emollick]

@MosheHazan6 And yes, they really did work that hard in the 19th century

“In 1870, workers in most of these countries worked more than 3,000 hours annually — equivalent to a grueling 60–70 hours each week for 50 weeks per year.” https://t.co/nuBYjXtUwd