frontpage.
newsnewestaskshowjobs

Made with ♥ by @iamnishanth

Open Source @Github

fp.

Open in hackernews

Behind the ballistics of the 'explosive' squirting cucumber

https://phys.org/news/2025-07-ballistics-explosive-squirting-cucumber.html
54•PaulHoule•6mo ago

Comments

lolc•6mo ago
Great capture and it's funny to read the "possible applications" section when you know humans just love watching slow motion exploding things.
firesteelrain•6mo ago
Wild how evolution landed on 53° as the ideal launch angle. Nature’s own ballistics optimization.
fsckboy•6mo ago
53° is very close to a 3-4-5 triangle
firesteelrain•6mo ago
Evolution meets Euclid.
abeppu•6mo ago
> The experiments also revealed that the fruit stem straightens up during ripening, creating an average 53° angle that is close to the theoretical perfect angle of 50° that would maximize shooting distance.

I recall from school that distance is maximized for a ballistic path when the angle is 45°. See e.g. https://www.scientificamerican.com/article/football-projecti...

Did someone get confused while writing this article or is there some reason why the optimal angle would be different in this situation?

crubier•6mo ago
45deg is optimal if you neglect air drag on the projectile
Sharlin•6mo ago
> speeds up to 29 miles per hour and reach shooting distances up to 12 meters.

My brain hurts.

But I learned a new word: mucilaginous.

temp0826•6mo ago
This reminded me of the South American "dynamite tree" (Hura crepitans, https://en.wikipedia.org/wiki/Hura_crepitans ), which wikipedia says launches seeds from its exploding fruits at 160 mph, up to 100 ft away! A pretty menacing tree actually, its trunk covered in huge thorns and it has a poisonous sap.
accrual•6mo ago
Wow. We really have it good considering most trees don't fire projectiles at us.
x______________•6mo ago
Some time ago, I grew clover in flower pots at the office and noticed one day that there were seeds stuck on the window pane.

Further observation revealed that clover flowers used a similar yet opposite mechanism to squirting cucumbers featured in this article. The seed pods would form and then dry out, and the dryness would form a tightness in the seed pod that upon touch(or given enough time and dryness), would burst out propelling its seeds far away from the plant.

While some seeds would stick to the window, I can only assume now that this is the seed itself clinging to other surfaced as another propagation method that I've not fully understood.

Comparing this experience to the article and the squirting cucumbers, I can imagine that the liquid used in this mechanism would only be useful to heavier seeds, as the added weight would hinder any 'dry' spread process.

This is only my immediate thoughts but it seems that evolution and time have figured out this concept long ago! Cool stuff!

(edit: typo)

sMarsIntruder•6mo ago
I know it’s not the point, but:

> 29 miles per hour and reach shooting distances up to 12 meters

Clash between Metric and Imperial is still alive.

OpenClaw ClawHub Broken Windows Theory – If basic sorting isn't working what is?

https://www.loom.com/embed/e26a750c0c754312b032e2290630853d
1•kaicianflone•20s ago•0 comments

OpenBSD Copyright Policy

https://www.openbsd.org/policy.html
1•Panino•1m ago•0 comments

OpenClaw Creator: Why 80% of Apps Will Disappear

https://www.youtube.com/watch?v=4uzGDAoNOZc
1•schwentkerr•5m ago•0 comments

What Happens When Technical Debt Vanishes?

https://ieeexplore.ieee.org/document/11316905
1•blenderob•6m ago•0 comments

AI Is Finally Eating Software's Total Market: Here's What's Next

https://vinvashishta.substack.com/p/ai-is-finally-eating-softwares-total
1•gmays•6m ago•0 comments

Computer Science from the Bottom Up

https://www.bottomupcs.com/
1•gurjeet•7m ago•0 comments

Show HN: I built a toy compiler as a young dev

https://vire-lang.web.app
1•xeouz•8m ago•0 comments

You don't need Mac mini to run OpenClaw

https://runclaw.sh
1•rutagandasalim•9m ago•0 comments

Learning to Reason in 13 Parameters

https://arxiv.org/abs/2602.04118
1•nicholascarolan•11m ago•0 comments

Convergent Discovery of Critical Phenomena Mathematics Across Disciplines

https://arxiv.org/abs/2601.22389
1•energyscholar•11m ago•1 comments

Ask HN: Will GPU and RAM prices ever go down?

1•alentred•12m ago•0 comments

From hunger to luxury: The story behind the most expensive rice (2025)

https://www.cnn.com/travel/japan-expensive-rice-kinmemai-premium-intl-hnk-dst
2•mooreds•13m ago•0 comments

Substack makes money from hosting Nazi newsletters

https://www.theguardian.com/media/2026/feb/07/revealed-how-substack-makes-money-from-hosting-nazi...
5•mindracer•14m ago•1 comments

A New Crypto Winter Is Here and Even the Biggest Bulls Aren't Certain Why

https://www.wsj.com/finance/currencies/a-new-crypto-winter-is-here-and-even-the-biggest-bulls-are...
1•thm•14m ago•0 comments

Moltbook was peak AI theater

https://www.technologyreview.com/2026/02/06/1132448/moltbook-was-peak-ai-theater/
1•Brajeshwar•14m ago•0 comments

Why Claude Cowork is a math problem Indian IT can't solve

https://restofworld.org/2026/indian-it-ai-stock-crash-claude-cowork/
1•Brajeshwar•14m ago•0 comments

Show HN: Built an space travel calculator with vanilla JavaScript v2

https://www.cosmicodometer.space/
2•captainnemo729•15m ago•0 comments

Why a 175-Year-Old Glassmaker Is Suddenly an AI Superstar

https://www.wsj.com/tech/corning-fiber-optics-ai-e045ba3b
1•Brajeshwar•15m ago•0 comments

Micro-Front Ends in 2026: Architecture Win or Enterprise Tax?

https://iocombats.com/blogs/micro-frontends-in-2026
1•ghazikhan205•17m ago•0 comments

These White-Collar Workers Actually Made the Switch to a Trade

https://www.wsj.com/lifestyle/careers/white-collar-mid-career-trades-caca4b5f
1•impish9208•17m ago•1 comments

The Wonder Drug That's Plaguing Sports

https://www.nytimes.com/2026/02/02/us/ostarine-olympics-doping.html
1•mooreds•18m ago•0 comments

Show HN: Which chef knife steels are good? Data from 540 Reddit tread

https://new.knife.day/blog/reddit-steel-sentiment-analysis
1•p-s-v•18m ago•0 comments

Federated Credential Management (FedCM)

https://ciamweekly.substack.com/p/federated-credential-management-fedcm
1•mooreds•18m ago•0 comments

Token-to-Credit Conversion: Avoiding Floating-Point Errors in AI Billing Systems

https://app.writtte.com/read/kZ8Kj6R
1•lasgawe•19m ago•1 comments

The Story of Heroku (2022)

https://leerob.com/heroku
1•tosh•19m ago•0 comments

Obey the Testing Goat

https://www.obeythetestinggoat.com/
1•mkl95•19m ago•0 comments

Claude Opus 4.6 extends LLM pareto frontier

https://michaelshi.me/pareto/
1•mikeshi42•20m ago•0 comments

Brute Force Colors (2022)

https://arnaud-carre.github.io/2022-12-30-amiga-ham/
1•erickhill•23m ago•0 comments

Google Translate apparently vulnerable to prompt injection

https://www.lesswrong.com/posts/tAh2keDNEEHMXvLvz/prompt-injection-in-google-translate-reveals-ba...
1•julkali•23m ago•0 comments

(Bsky thread) "This turns the maintainer into an unwitting vibe coder"

https://bsky.app/profile/fullmoon.id/post/3meadfaulhk2s
1•todsacerdoti•24m ago•0 comments