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The Silurian Hypothesis (2020)

https://www.theparisreview.org/blog/2020/01/23/the-silurian-hypothesis/
16•andsoitis•1h ago

Comments

throw310822•34m ago
So we have microbial fossils from 3.5 billion years ago, fossilised 300 million year old skin, bones from almost 200 my ago, even actually soft tissue inside a fossilised bone from 70 my ago. Ah, footprints too, the most unsubstantial matter of all: pure shape. That's in addition to all the million other fossils that are so common we hardly care: shells, small bones, etc.

And someone is saying there could have been an entire advanced civilization 400 million years ago, large and powerful enough to cause climate change, and that no traces of it would possibly be left? Like, billions of individuals, cities, factories, metals, concrete, mines, wells, roads and bridges and tunnels, stone sculptures!, plastic, waste dumps, farms, agricultural land, billions and billions of artifacts of all materials, most of them entirely artificial. All gone because "nothing resists 400 my" and, "oh btw, check this dinosaur footprint and this fossilised piece of skin, how cool"?

gorgoiler•23m ago
The counter argument: dinosaurs were around for a staggering amount of time, no pun intended. 165 million years is reasonably long enough to ensure they left behind some nests, bones, and a feather or two. Modern humans have been around for more like 0.02 million years.

The counter-counter argument is that while we’ve been here for a comparative blink of an eye, we’ve left behind 4 orders of magnitude more stuff than just nests, bones, and a feather or two.

throw310822•4m ago
Indeed. Did a rapid check on T-rex, just as an example. Was around for max 3.6 million years. Max population at any one time must have been around 20k individuals. We have about 150 skeletons.

So current human population is 400 thousand times the maximum T-rex population at any one time. A few decades are enough to produce more human individuals than all the T-rexes combined. We also have the ability to go (and die) pretty much anywhere, so there will be human skeletons in every crevice, depth and environment on Earth. We also produce an absolutely staggering amount of artifacts of all kinds, from plastic straws to giant tunnels and artificial caves. There are zero chances an advanced civilisation on Earth won't be aware of us in 400 million years.

xg15•22m ago
> or it could’ve been the eruption of a monster volcano, the sort that presently smolders beneath the Atlantic.

I know about Yellowstone, Campi Flegrei, etc, but I haven't heard about a supervolcano below the Atlantic. What's that referring to?

steve1977•17m ago
The timelines don't really add up for me.

So there could have been this hypothetical civilization 55 million years ago already. And they've only just disappeared (if they did) 10'000 or so years ago? Without a trace?

Also, no, a conspiracy cannot be the answer to a question we've not yet asked. The word has a clear meaning, it requires people to conspire to hide something from you.

Qem•17m ago
Reminds me of this comic: https://badspacecomics.com/scour-copy-copy
api•17m ago
This is a good thought experiment to show how time is as vast as space.

400 million years ago is as distant as the stars. The Earth was a different planet then, in a sense.

It’s also yet another Fermi paradox answer. Even if our civilization lasts for millions of years, that’s a blip. We are searching both space and time and both are incomprehensibly vast.

jmclnx•14m ago
>The oldest place on the earth’s surface—a stretch of Israel’s Negev Desert

I do not understand this statement, I thought an area in Quebec was around 3 - 4 billion years old. I looked, seems Australia may have the oldest area:

https://www.bbc.com/travel/article/20220126-is-the-pilbara-t...

But I say the article could be true, but the only issue I have is the large dinos. I would think they could be an impediment to any organized settlements.

One other thing, didn't most of our fossil fuels come from the Carboniferous era ?

https://en.wikipedia.org/wiki/Carboniferous

meindnoch•12m ago
Joe Rogan tier pseudoscience.

Meta just created a moderation nightmare for its smart glasses

https://www.theverge.com/report/970901/instagram-meta-glasses-prank-harassment-ban
2•Brajeshwar•2m ago•0 comments

Codex now leads Claude Code in first-time Homebrew installs for last 30 days

https://formulae.brew.sh/analytics/cask-install/30d/
1•jackdanela•5m ago•1 comments

Show HN: Proton – An immediate-mode GUI library for Go built on Gio without CGO

1•CzaxTanmay•5m ago•0 comments

Scientists Uncover Lost ‘Golden Age’ of Languages That Ended 1,000 Years Ago

https://www.404media.co/scientists-uncover-lost-golden-age-of-languages-that-ended-1-000-years-ago/
1•Brajeshwar•6m ago•0 comments

Claude Code Lightbar for Mac OS

https://github.com/gregsramblings/claude-status-bar
1•gw5815•7m ago•1 comments

Open-weight AI is having its Kubernetes moment. Let's not ruin it

https://tobi.knaup.me/2026-07-25-open-weight-ai-is-having-its-kubernetes-moment/
1•tknaup•7m ago•0 comments

Show HN: Cubic Doggo 06R: 12-DOF 4-Legged Robot with IMU

https://github.com/SphericalCowww/CubicDoggo_06R
1•SphericalCowww•8m ago•0 comments

Try Unlimited Text to Image Generator for Free

https://free-ai-art-generator.pages.dev
3•rrrpro123•12m ago•4 comments

Arsonists used cats to spread Italy's wildfires – CNN

https://www.cnn.com/2026/07/22/europe/arson-cats-italy-wildfires-latam-intl
1•nic_wilson•12m ago•0 comments

Fast Synthesis of Basic Oscillators

https://artemis.sh/2026/07/23/fast-synthesis-basic-oscillators.html
1•fanf2•15m ago•0 comments

Show HN: IPAbet – A fast, memorable keyboard for International Phonetic Alphabet

https://ipabet.org
1•bikeshaving•15m ago•0 comments

Chinese retirees are driving a new wave of study abroad enrollment

https://www.sixthtone.com/news/1018818/China’sStudyAbroadBoomFindsaNewGeneration:Retirees
1•whiteblossom•15m ago•0 comments

The AI jobs apocalypse probably isn't coming anytime soon

https://www.theguardian.com/technology/2026/jul/25/ai-jobs-apocalypse-human-labor
3•beardyw•16m ago•0 comments

Task-centered iproute2 user guide

https://baturin.org/docs/iproute2/
1•greengreengrass•25m ago•0 comments

Ask HN: Why are Meta products so bad?

1•asxndu•25m ago•2 comments

UNESCO adds West Bank and Lebanese sites to heritage despite Israeli objections

https://apnews.com/article/unesco-sebastia-lebanon-mount-amel-israel-heritage-12c558a4b6aa03fa40a...
3•hebelehubele•27m ago•1 comments

2x, not 10x: coding with LLMs in 2026

https://obryant.dev/p/2x-not-10x/
2•tnisonoff•30m ago•0 comments

Yes, the Hong Kong of Old Is Over

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1•ksec•35m ago•1 comments

Deep Brain Stimulation

https://en.wikipedia.org/wiki/Deep_brain_stimulation
2•soupspaces•35m ago•0 comments

Waymo's driverless cars involved in 68% fewer crashes, U.S. study finds

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2•curmudgeon22•40m ago•0 comments

Who's making money from using/exploiting AI?

4•jonthepirate•45m ago•0 comments

Scanwheel is a drum style mechanical television you can build yourself

https://github.com/AncientJames/Scanwheel/
2•tobr•46m ago•0 comments

I timed 7,194 journeys to find London's most equidistant pub

https://equidistance.io/londons-most-equidistant-pub/
1•lambfruit•48m ago•0 comments

Introduction to Multiparty Computation Tutorials

https://docs.stoffelmpc.com/tutorials/overview
2•badcryptobitch•49m ago•0 comments

Silicon Valley Splits over Closing the Borders to Chinese A.I

https://www.nytimes.com/2026/07/25/technology/open-source-silicon-valley-china.html
2•sbulaev•50m ago•0 comments

Samsung wins $200B Broadcom AI chip partnership, boosting foundry push

https://www.reuters.com/business/autos-transportation/samsung-elec-wins-200-billion-broadcom-ai-c...
3•geox•54m ago•0 comments

RedisME: RDM tool for Java serialization in the world

https://www.hepengju.com/
1•hepengju•58m ago•0 comments

A Convergence of Health Crises Under Robert F. Kennedy Jr. Leadership

https://bluepressjournal.substack.com/p/us-faces-multipronged-public-health
2•WinstonWendell•1h ago•0 comments

FDA panel supports broadening access to peptides popular on the gray market

https://www.npr.org/2026/07/23/nx-s1-5903202/fda-peptides-restrictions
2•andsoitis•1h ago•0 comments

Real Linux for your smartphone: Ubuntu Touch release 24.04-2.0 and 24.04-1.4

https://ubports.com/blog/ubports-news-1/ubuntu-touch-24-04-2-0-and-24-04-1-4-release-4007
3•readyblue•1h ago•1 comments