Day four of #ArtAdventCalendar. Here’s a pen and pencil drawing of a woodcock (one of my favourite birds) flying out to forage as the full moon rises behind a distant hill.

Watching a cumulus congestus transforming into a cumulonimbus endlessly fascinating. As soon as the upper regions reach the tropopause (the boundary between the troposphere and the stratosphere) they start to spread out, forming an incus, the well known anvil shape of a storm cloud.

YKK, the Japanese company that makes roughly half the world’s zippers, is making the first major uprade in 100 years to the mechanism that holds much of modern clothing together. Wow!

Camouflage of moths. One of last week's monoprints.

Golden Snowdon 🏴󠁧󠁢󠁷󠁬󠁳󠁿 #442Mountains

Loved the conversation between Brian Eno and Ezra Klein. One of the rare skills Eno has is to discuss potentially-pretentious topics with neither a trace of pretension nor a trace of post-modern irony. He says insightful things in a straightforward way. www.youtube.com/watch?v=AfYY...

The "testicular pie chart". A lost art. on.ft.com/4gHlvS8

Claerwen Reservoir from Gorllwyn, an especially remote-feeling mountain in the 'Green Desert of Wales'. Its waters journey through an underground aqueduct, eventually quenching Birmingham’s thirst. 🏴󠁧󠁢󠁷󠁬󠁳󠁿 #442Mountains

A cloud sea surrounds Yr Wyddfa (Snowdon) from Aran Fawddwy. July 2025 #442Mountains

Skiary by Loch Hourn. Pic: Quintin Lake

Come and see prints of my favourite photographs from #ThePerimeterBook and hear me share stories from the 11,000 km journey. Join us at Klattermusen King’s Road, London, this Thursday from 6pm — free event! Book here 👉 is.gd/MiJmXz

I find myself re-reading Alain de Botton's "The Art of Travel" two decades after the first read. I liked it then but had forgotten quite how much. Such a fun, charming, clever book. amzn.to/3VEBRBk

Nice gift "Plate Tectonics Flip Book" from the author Ch. Scotese to our tectonist J. Lazauskienė 😀

Ed Caesar's "Two Hours" is a luminous piece of sports writing - all about the marathon, elite marathoners, Kenyan running culture, and much else. Loved it. amzn.to/3JDe0PK

In a “stunning” result from a Kenya study, researchers discover a secret weapon that saves babies’ lives. And it’s not medical.

Yesterday, I completed backpacking across all 188 Welsh mountains, finishing with a camp beside the summit tor of Mynydd Graig Goch after traversing the spectacular Nantlle Ridge. I’d saved the ridge for last, having heard how incredible it is — and it didn’t disappoint. #442Mountains

The Perimeter is now shortlisted for the @wainwrightprize.bsky.social ! If the book spoke to you, I’d love if you’d share it with others – every word of mouth helps. 👉 amzn.to/4mpt9SH ⛺️📷⛺️📷⛺️📷⛺️

A little watercolour colour sketch from the beach whilst we were away. Fishing boats and paraphernalia.

Edinburgh chimneys 🏴󠁧󠁢󠁳󠁣󠁴󠁿 A full-page opener introducing the #Midlothian chapter of #ThePerimeterBook Order here 👉 amzn.eu/d/3pWJtK6

Today I printed the first edition of this vista of Princes Street from Calton Hill photographed during The Perimeter. Browse the #Edinburgh print shop here 👉 is.gd/L7IlW0

Plockton with Sgurr a’Chaorachain and Beinn Bhàn 🏴󠁧󠁢󠁳󠁣󠁴󠁿 A full-page opener introducing the West Ross and Cromarty chapter of #ThePerimeterBook Order here 👉 amzn.eu/d/3pWJtK6

It's a good 'un! Take a look at my review: popsciencebooks.blogspot.com/2021/10/a-ve...

Looking forward to it :-)

The Perimeter is out today! Here's a quick flick through 11,000 km and ten years'work! Pick yours up here 👉 is.gd/fyjJcq

Well, this is exciting news! 🏺 thebookseller.com/rights/elliott…

My latest article on Our World in Data, looking at foreign aid and the difference we can make with personal donations: ourworldindata.org/foreign-aid-...

Review: Pagans: James Alistair Henry ***** - Extremely engaging crossover between alternate history SF featuring a still-pagan UK divided between Celts, Saxons and others & procedural police mystery. Great fun popsciencebooks.blogspot.com/2025/02/paga... #bookreview #sciencefiction #alternatehistory

In Senegal, the “forgotten” half-moon method of harvesting water transforms “barren wasteland” into thriving farmland, as part of the Greenwall Project. Remarkable!

Day 6 of #ArtAdventCalendar. This pastel painting is called ‘Starlit Path’. It’s only small, but it features something big; Orion, my favourite winter constellation. ✨

A holloway so thick with atmosphere that I had to slice my way through. #HollowayWednesday

Sometimes, the most important news is when something *isn’t* happening: Since the last plane crash by a US airline, they have transported passengers for more than two *light-years*

Last night, Cambridge University Botanic Garden

In these nine African countries, average incomes have more than doubled since 1990

Leaving the library (Cambridge, this evening)

“Winter Walk” I usually don’t include human elements in my images, but I couldn’t resist here… #minimalism #winter #photography