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A Nobel for catching ghost particles.

Neutrinos pass through almost everything, including you. IceCube watches a cubic kilometre of clear Antarctic ice for the faint flash of light when one hits. Francis Halzen's work on it won the 2026 Nobel Prize in Physics.

A Deep Dive on how you build a detector out of ice is next.

#nobelprize #physics #neutrinos

Your hands are mirror images that never line up.

Some molecules work the same way: same atoms, mirror-image shapes, and your body can tell the two apart. The 2026 Nobel Prize in Chemistry went to Henri Kagan and Kenso Soai for ways of making mostly one mirror image instead of an even mix.

A snail shell is chiral too. Most of them spiral the same way.

#nobelprize #chemistry #chirality

Imagine switching one neuron on with a flash of light.

Optogenetics puts a light-sensitive channel into chosen nerve cells, so a pulse of light can turn them on or off. It lets scientists test what a specific cell really does. Karl Deisseroth, Peter Hegemann and Georg Nagel share the 2026 Nobel Prize in Physiology or Medicine.

Light as a switch for the brain. That is a good Deep Dive.

#nobelprize #neuroscience #optogenetics

A clock that ticks inside an atom's nucleus.

Ordinary atomic clocks use electrons. This one uses thorium-229, a nucleus that absorbs laser light at one exact frequency. If the laser drifts, the absorption drops and the clock corrects itself. It ran for more than 24 hours with no help, reported in Nature on 7 October.

It is not yet as precise as the best optical clocks, but it shows a nuclear clock can run on its own.

#physics #timekeeping #nuclearclock

A new driving record, on another planet.

Perseverance's odometer passed about 45.22 km on 11 October 2026, just beyond Opportunity's 45.16 km. Opportunity explored Mars from 2004 to 2018. The image is Victoria Crater, one of the places Opportunity explored.

Next: why rovers stop to study rocks instead of racing.

#mars #nasa #space

You can download it. That does not make it open source.

'Open weights' means the trained numbers are public, so you can run the model yourself. 'Open source' also means a licence that lets anyone freely use, change and share it. Meta's Muse Spark Open release on 15 October is the first kind: the weights are on Hugging Face under Meta's own Muse Model License, which adds commercial conditions.

Read the licence before you build on any model.

#AI #opensource #LLM

Four people. One loop around the Moon. The first since 1972.

Artemis II launched on 1 April 2026, looped the Moon on 6 and 7 April, and splashed down in the Pacific off San Diego on 10 April. The crew: Reid Wiseman, Victor Glover, Christina Koch and Jeremy Hansen.

Next: Artemis III, an Earth-orbit test flight targeted for mid-2027, then the first landing on Artemis IV, targeted for early 2028.

#artemis #moon #nasa

Black holes have a switch-on number.

Adelle Goodwin (Curtin University) and Andrew Mummery (Institute for Advanced Study) studied ten black holes that tore apart a passing star. Each launched a delayed jet once its feeding rate dropped to about 2% of the Eddington limit, the rough ceiling for steady feeding. Smaller black holes in our own galaxy show the same threshold. Published in Nature Astronomy on 17 September.

Shared physics across sizes, and a hint of when to point the telescopes. It is a ten-event sample, so more data will test it.

#astronomy #blackholes #space

A new set of eyes on our planet.

Sentinel-3C launched on 15 September 2026 on a Vega C rocket from French Guiana. On 8 October it returned its first views of Earth, starting with Italy. The Sentinel-3 satellites measure sea temperature, sea level, water colour and land temperature, from a sun-synchronous orbit about 820 km up.

New satellites go through testing and calibration before their data is released.

#space #copernicus #earthobservation

A free show this week, courtesy of Halley's Comet.

The Orionids are leftover dust from Halley's Comet burning up in our atmosphere. The peak is the night of 21–22 October, with roughly 15 to 25 meteors an hour under dark skies, and the nights either side are worth a look too. A bright Moon will wash out the faint ones, so wait until it sets.

Look toward Orion, give your eyes 20 minutes, and skip your phone.

#orionids #meteorshower #astronomy

Your camera is a grid of light buckets.

Millions of photosites collect photons for a fraction of a second. More light, bigger charge. A colour filter on top, called a Bayer pattern, lets each bucket see only red, green or blue, and software fills in the rest.

Full Deep Dive on YouTube. Link in bio.

#photography #howthingswork #science

An LLM is a very good next-word guesser.

Training teaches it which token tends to follow which, across a huge amount of text. Then it writes one token at a time, feeding its own output back in. Everything it does comes from doing that one thing well.

Part two: why that is enough to look like reasoning.

#AI #LLM #howthingswork

Every app you use is a pile of switches.

A transistor is a switch with no moving parts: on is 1, off is 0. Arrange a few and you can add. Arrange billions and you have a processor. That is all a chip is, made absurdly small.

Next up: how those switches get printed onto silicon.

#semiconductors #chips #howthingswork

There is no 3 nm anything inside a '3 nm' chip.

Decades ago, the number meant a real feature size. Now it is a marketing label for a generation of manufacturing, and it stopped matching physical dimensions years ago. Compare chips by density and performance, not by the number.

Save this for the next chip launch.

#semiconductors #chips #tech

Noise cancelling adds sound to remove sound.

A microphone samples the noise around you. A chip builds the same wave flipped upside down, so every peak meets a trough, and the speaker plays it. The two waves add up to almost nothing. It works best on steady low sounds like engines.

That is why it struggles with sudden noises like voices.

#audio #howthingswork #science

Why is the sky blue? Because air is picky about colour.

Sunlight contains every colour. Air molecules scatter short, blue wavelengths much more strongly than long, red ones, so blue light gets thrown across the sky and reaches you from everywhere. At sunset, light travels through more air, the blue scatters away and the red is what is left.

Same physics, two skies.

#science #physics #howthingswork

GPS never sees you. It only listens.

Each satellite broadcasts its position and the exact time. Your phone measures how long the signal took to arrive, which gives a distance. With signals from at least four satellites, it can solve for where you are and for its own clock error.

Atomic clocks in space make a map in your pocket.

#gps #howthingswork #tech

A lithium battery is ions commuting.

While charging, lithium ions are pushed from one electrode to the other. While you use it, they drift back, and the electrons that cannot pass through the battery itself flow through your device instead. That flow is the power.

Heat and deep discharge wear out the electrodes. That is why batteries age.

#battery #energy #howthingswork

How do two strangers agree on a secret in public?

With clever maths. Your browser and the site exchange values that let both of them compute the same secret key, without ever sending the key itself. After that, everything is scrambled with it. HTTPS also lets the site prove who it is, using a certificate.

It does not mean the site is trustworthy, only that the connection is private.

#security #https #howthingswork

A JPEG is a photo with the boring parts deleted.

Your eyes are far more sensitive to brightness than to fine colour detail. JPEG splits a picture into small blocks, keeps the brightness detail you can see and throws away the colour detail you cannot, and the file shrinks a lot. Save it too many times and the damage shows.

That is why screenshots of screenshots look rough.

#photography #compression #howthingswork

The fastest way to learn something is to try to teach it.

Often credited to Richard Feynman: write down the idea as if you were explaining it to a child. Wherever you get stuck or reach for jargon, you have found a gap. Go back to the source, fill the gap, and explain it again.

Do it on paper. It is harder to bluff.

#learning #feynman #notes

Most advice is a copy of a copy.

First-principles thinking means breaking a problem into the facts you can verify, then rebuilding the answer from them instead of from habit. It is slower the first time and it finds options that copying never will.

Ask: what do I know for certain here?

#thinking #learning #notes

You don't need a plan. You need the next question.

Each thing you look into makes the next thing easier to understand, and shows you three more you did not know to ask about. Do that for a few years and you have expertise that no course could have handed you.

What is one thing you were curious about this week?

#curiosity #learning #notes

The second time is the signal.

Once is a task. Twice is a pattern. The third time you will be doing it by hand for no reason. Write the script, set up the shortcut or teach the tool, even if it takes longer than the task itself. It pays back every time after.

What did you do twice this week?

#automation #productivity #buildinpublic

Nobody ever regretted shipping a day early.

A working ugly version teaches you what people actually do with it, which no amount of planning can. Make it work first, then make it good, then make it pretty. In that order.

What is one thing you could put in front of someone today?

#buildinpublic #shipping #coding

More options make work slower, not better.

Give yourself one typeface, one accent colour and one idea per frame. Every decision you do not have to make is time spent on the part that matters. A strict system is not a cage, it is a fast lane.

What is one choice you could remove from your next project?

#design #creativity #studio