It’s fun to go through this article and replace the word ‘ageing’ with the words ‘cancer’ or ‘dementia’. I don’t think longevity science is ageist—I want everyone to have a chance to be healthy, however old they are!

If you couldn’t see it on LinkedIn, my post on Bryan Johnson’s autoimmune gastritis diagnosis is now on my website:

Longevity entrepreneur Bryan Johnson has autoimmune gastritis: "My stomach is eating itself," he wrote. Experts say this could raise awareness over a chronic disease that's very hard to diagnose, and often missed by gastroenterologists: www.statnews.com/2026/07/08/b...

I wrote a piece about Bryan Johnson’s diagnosis with autoimmune gastritis. Check it out here: www.linkedin.com/pulse/bryan-...

I wrote a piece about Bryan Johnson’s diagnosis with autoimmune gastritis. Check it out here: www.linkedin.com/pulse/bryan-...

GET HEARING AIDS ❤️ stop worrying if they're cool they're like glasses just get them and wear them this one's for the dads out there (except my dad, he's cool and wears his aids)

Hi, welcome back to Séamas's Boarding Pass London City Airport to Derry 23rd August 2026, boy do we have a great show for you but first I'd like to tell you all about our friends at Athletic Greens who

I’m genuinely sorry to hear that Bryan is unwell. But this episode shows the limits of flashy biohacking theatre vs real medicine: too much focus on social-media-friendly measures like epigenetic clocks and night time erections while overlooking low ferritin for over a decade.

Happy 250th birthday, America! 🎂🇺🇸 To put that into perspective: here are some animals that live even longer—some of them alive today were probably around when the Declaration was signed… 🧵

Comparing the UK heatwaves of June 1976 and June 2026... Daytime maximum & night minimum temperatures were much hotter in 2026. Details: maxima over 21st-30th June in both years. Uses provisional 2026 HadUK-Grid data from Met Office NCIC. Note the difference scale is larger for night minimums.

Amazing work, though for the moment these things/devices can’t synthesise new ribosomes, so they die/stop working after a few generations when the ones they have been given wear out. Read it and be amazed! And it’s non-patented!

‘The Interventions Testing Program, which discovered or validated many of the best longevity drugs in mice, runs on a budget that’s only about twice what Bryan Johnson spends on his health every year.’ Are billionaires are obsessed with longevity? Check out my new article for BBC Science Focus: 🧪

Just one possible outcome... but the GFS weather forecast model is suggesting 40-41°C is possible in the UK around 7th July. This is a long-range forecast with significant uncertainty, but the fact that we are even seeing such values fairly regularly in the forecasts is extraordinary.

This weather isn’t just bad for your health because it’s hot: it also affects the air we breathe. 🧪

This silver parasol reflects both UV (sunburn, skin ageing) and IR (heat), so I’m trying it out in the oppressive 35°C heat in London. I’d like to do a randomised trial to see if it actually affects my core body temperature, but I think it would be unethical to put myself in the control group.

I think this is a fair point, up to a point. I'm qualifying because there is a long and established debate in the field, with all the arguments worked through. Those working on this have engaged.

I’m starting to think this whole ‘climate change’ thing wasn’t such a great idea

If other news was reported like climate change:

EXLCUSIVE: An analysis by two MIT researchers shows how Russia's nuclear-powered cruise missile actually works. And guys, it's not pretty. 🚀☢️🤢🧵 www.npr.org/2026/06/18/n...

A new study suggests the uptick in young people getting cancer is because they’re biologically older. Target the ageing process and you might help the 30-year-olds too! And a proper interventional study would finally tell us what these ageing clocks are actually measuring…

The days will start getting shorter… …wait for it… …now! Summer solstice 2026, June 21st, 08:25 UTC (09:25 BST, 10:25 CEST).

Vaccines can literally prevent cancer—and the new HPV jab statistics are even more remarkable than the headline. New article:

Racism Goldilocks strategy is hard to execute

"If we assume that this is governed by a Poisson distribution—a good first approximation for random events—the probability of observing zero deaths in 2020–24 without the vaccine is: P(0) = e⁻²²·⁷ ≈ 1.4 × 10⁻¹⁰ That's roughly 1 in 7 billion—ie, essentially impossible"

Vaccines can literally prevent cancer—and the new HPV jab statistics are even more remarkable than the headline. New article:

Incredible: vaccines can literally prevent cancer! Truly one of humanity’s greatest achievements. Now let’s do some of the other awful viruses that seed chronic disease.

I’m pretty sure a ladybird would beat a skateboard in a race

Great piece by @dkthomp.bsky.social on the perils and opportunity cost of taking self-optimisation too far. What do we miss out on? In my view, the solution is to slow ageing with medicine: we can all be a bit less obsessive, have more fun, and live longer anyway…

Incredible: vaccines can literally prevent cancer! Truly one of humanity’s greatest achievements. Now let’s do some of the other awful viruses that seed chronic disease.

one anecdote: I was searching for a link to one of my old papers on Google, and the automated Gemini summary attributed all of my lab's work to my husband

‘It’s simultaneously a wellness fad and potentially the greatest revolution in the history of medicine.’ A pleasure to speak to @stokel.bsky.social about billionaire biohackers vs real longevity science fighting for tens of millions to see if anything works. Check out the story in @nature.com:

Red moon rising over Oxford. 15 years ago today, I took this photo from a field a few miles outside Oxford—and it was a runner up in Astronomy Photographer of the Year 2011! I had planned it for June 15th, when a total lunar eclipse would have been visible…but it was cloudy, so…

Published in The New England Journal of Medicine. Peer-reviewed. Large sample size. Sound methodology. An antiviral pill has, for the FIRST time, been shown to PREVENT COVID-19 in individuals exposed to SARS-CoV-2. Ensitrelvir blocks the enzyme coronaviruses need to make new copies of themselves.

Great overview from @hankgreen.bsky.social of the new trial of a permanent gene therapy to reduce cholesterol…and the potential ethical can of worms it opens up!

This was a fun interview! Thank you @benansell.bsky.social for a great chat. :)

Short form video has been a far greater mistake than agriculture.

We’ve been on there for a while, but just officially launched on @linkedin.com! Check out our article on what we started a think tank, not a biotech – and please give us a follow over there and share our page with your network.

Cancer gets over 80 times more research funding per death than ageing does—even though ageing *causes* most cancer. Please share the new analysis from @thelongevityinitiative.org!

Does NIH research funding track what actually kills Americans? Building on A4LI’s new report, we ran the numbers: and ageing fares worst. Ageing causes 83% of deaths, yet receives just 1.2% of the research funding per death that cancer does—around $1 per American per year.

At least 750 cases of Ebola and 177 deaths so far in the DRC which struggling to manage due to severe cuts in aid and conflict. Researchers in Oxford are rushing to create a vaccine but won’t be ready for some time

New post: Can longevity save us from a population crisis? We tried out @ourworldindata.org’s new population projection tool to see if increasing life expectancy could save us from demographic decline:

Everyone’s talking about falling birth rates. South Koreans had 30% fewer babies than the UN predicted just a few years prior. But the UN is also very *pessimistic* on longevity. Check out our new post on whether longer lives could alter our demographic destiny:

The Ebola outbreak in the DRC has now been confirmed as the Bundibugyo strain. This is not good news, there are no licensed or candidate vaccines for this strain. No monoclonal antibodies. I am sure experimental antivirals will be tried. www.afro.who.int/countries/de...

I flew from Germany to San Francisco today, and the views of the frozen north were the best I’ve ever had. We really need to do more to protect this vast, fragile expanse. (I understand the irony of being reminded of this from a long-haul flight.)

Thank you, Simon! That means a lot. James is a fun interviewer!

Happy 100th birthday, Sir David Attenborough! For every 1,000 boys born in 1926, only 5 are still around today. He’s a national treasure *and* a statistical outlier.

This video is a rare swing and substantial miss by @kurzgesagt.org. Most importantly, they don’t engage with improving health: assuming everyone over 65 is a burden is wild when 65 was first set as Germany’s pension age in 1916—at a time when life expectancy in Germany was around 55!

Happy 100th birthday, Sir David Attenborough! For every 1,000 boys born in 1926, only 5 are still around today. He’s a national treasure *and* a statistical outlier.

This is happening far too often. Good time to set up Google Alerts for your name, if you haven't already. The journalism industry had been squeezed before AI showed up and now falling standards are cratering. It makes me sad. Good journalism is a service the public should want and should pay for.