Pierre
LightNews LightNews
banner
pcauchy.bsky.social
Pierre
@pcauchy.bsky.social
76 followers 88 following 20 posts
Ocean eavesdropper, glider whisperer, slow and far runner, he/him.
Posts Replies Media Videos
Reposted by Pierre
mikeachim.bsky.social
OK, this is wild.

In September 2023, geophysicists across the world started monitoring a very odd signal coming from the ground under them.

It was picked up in the Arctic. And Antarctica. It was detected everywhere, every 90 seconds, as regular as a metronome, for *nine days*.

What the HELL?

1/
Unsplash image of the Earth, mostly the nightside with a tracery of city lights on every continent.
May 12, 2025 at 3:20 PM
Reposted by Pierre
cnrs.fr
#CNRSnews 📰 Researchers have succeeded in developing a model ice floe in order to elucidate the mechanism responsible for the dislocation of the sea ice and predict its behaviour in the current context of climate change.
Breaking the ice
news.cnrs.fr
March 20, 2025 at 10:57 PM
Reposted by Pierre
bmann.ca
"Signal would exit the French market before it would comply with this law as written"

Meredith Whittaker @meredithmeredith.bsky.social, President of Signal @signal.org
Screenshot of X post: https://x.com/mer__edith/status/1902383162065400296, part 1 BAT SIGNAL: A law in France that would mandate a backdoor in end to end encrypted communications is set for a vote within the next day, after some start-stop skirmishes. The French Narcotraffic law would require encrypted communications providers—like Signal—create a backdoor by giving the government the ability to add themselves to any group or chat they like. In the name of (checks notes) fighting drug trafficking. While those hyping this bad law have rushed to assure French politicians that the proposal isn’t’ ‘breaking encryption’ their arguments are as tedious as they are stale as they are laughable. For those catching up, let’s review the basics: end to end encryption must only have two ‘ends’—sender and recipient(s). Otherwise, it is backdoored. Whatever method is devised to add a ‘third end’ —from a perverted PRNG in a cryptographic protocol, to vendor-provided government software grafted onto the side of secure communications that allow said government to add themselves to your chats—it rips a hole in the hull of private communications and is a backdoor. Indeed, the ghost participant proposal was roundly rebuked (humiliated, even) when it was first proposed in 2019 in the UK. The technical community was united, and it was never implemented in law or otherwise. Screenshot of X Post, Meredith Whittaker, President of Signal https://x.com/mer__edith/status/1902383162065400296 We cannot accept any backdoor, however it’s dressed up. Communications don’t stay within jurisdictional boundaries. Which means a hole created in France becomes a vector for anyone wanting to undermine Signal’s robust privacy guarantees, anywhere. Instead of contending with unbreakable math, they only have to compromise a French government employee, or the vendor-provided software used to sideload government operatives into your private chats. This is why, as always, Signal would exit the French market before it would comply with this law as written. At this moment especially, there is simply too much riding on Signal, on our being able to forge a future in which private communication persists, to allow such pernicious undermining. We hope—WE HOPE—that this callow, dishonest attack will fail, and will be the last. We would love to get back to the work of maintaining and improving our core technologies, instead of fighting legislation which is distinguished in nothing as much as its refusal to listen to decades of expert consensus in its drive to imperil global cybersecurity and the human right of privacy.
March 19, 2025 at 7:54 PM
Reposted by Pierre
uqar.bsky.social
Une série documentaire sur la santé du fleuve Saint-Laurent
Une série documentaire sur la santé du fleuve Saint-Laurent
Savoir média vient de lancer une série documentaire intitulée Fleuve en eaux troubles. Plusieurs chercheuses et chercheurs de l’Université du Québec à Rimouski et de son Institut des sciences de la…
www.uqar.ca
February 27, 2025 at 12:12 PM
pcauchy.bsky.social
I made it to Youtube! I guess I'm famous now?
It's all in French, but I've included some super cool sounds, such as Leopard seals singing under the ice, recorded from a @uniofeastanglia.bsky.social ocean glider in the Ross Sea.
🔊🧪🌊🐋 Happy anniversary ISMER-@uqar.bsky.social
youtu.be/17zsGDg8Uc0?...
Conférence – Pierre Cauchy – ISMER-UQAR
YouTube video by UQAR - Université du Québec à Rimouski
youtu.be
January 31, 2025 at 6:44 PM
Reposted by Pierre
whoi.edu
🧑🏽‍🔬 Searching for the perfect #postdoc? We’re currently seeking applicants specializing in #IndigenousKnowledge Systems for a 2-year position.

Consideration will begin soon! 📲Find out more and apply today: go.whoi.edu/ikp-postdoc

#hiring #joinus #stemjobs #dei
January 11, 2025 at 5:28 PM
Reposted by Pierre
davidho.bsky.social
I’m such a downer. Definitely don’t invite me to your party.

www.cbc.ca/listen/live-...
Sometimes the truth hurts. And when it comes to fighting climate change, we have obstacles ahead – including the likely reality that global temperatures in 2024 will hit 1.5 C above pre-industrial levels. That’s even before Donald Trump’s return to the White House could bring a big shift in climate policies. But that doesn’t mean the fight is over. David Ho, a professor at the University of Hawaii, explains what the next goal should be and how we could get there.
January 4, 2025 at 7:16 PM
Reposted by Pierre
thelifeaquatic.xyz
Postdoctoral Fellowship to work on the Transforming Climate Action Project in collaboration with Dal, Laval, UQAR

Based @marineinstitute.bsky.social Memorial University in St. John's, Newfoundland 🇨🇦

Apply by Jan. 31, 2025

#postdoc #climatechange #ecology

static1.squarespace.com/static/5d780...
December 12, 2024 at 12:32 PM
pcauchy.bsky.social
pflax1.bsky.social Peter Flax @pflax1.bsky.social · Dec 4
I wanted to talk about the "oopsie wave," that thing many drivers do after they almost hit or hurt a bike rider.
December 4, 2024 at 3:21 PM
pcauchy.bsky.social
Couple of sperm whales clicking along.
These were recorded by the yellow submarine shown in the picture. 🌊🧪🐋🔊
on.soundcloud.com/Hjg7c4hiny8U...
Underwater glider equipped with a hydrophone and other scientific instruments. Manta ray in the background
December 3, 2024 at 3:52 PM
Reposted by Pierre
davidho.bsky.social
Black Friday Deal Alert!

Enjoy our current atmospheric CO₂ because we'll never see it this low again!
A graph depicting the global monthly mean carbon dioxide (CO2) levels from 1980 to 2024, showing a steady increase in CO2 mole fraction measured in parts per million (ppm), with data points represented by red dots and a trend line.
November 29, 2024 at 5:47 PM
Reposted by Pierre
davidho.bsky.social
A person on a bicycle is by far the most energy-efficient among animals and machines per distance traveled relative to body weight. The bicycle is magic.

www.jstor.org/stable/24923...
A graph titled "Cost of Transport" showing the relationship between body weight (in kilograms) and energy consumption for distance traveled (calories per gram per kilometer) for various animals and machines. It highlights that a person on a bicycle ranks first in efficiency.
November 24, 2024 at 11:12 PM
Reposted by Pierre
rebeccarhelm.bsky.social
There are a lot of well-meaning people at The Ocean Cleanup. I have no doubt their hearts are in the right place. But their ocean plastic fishing is a huge distraction at best, and a dangerous gamble at worst. We can all do better. [end 🧵]

bsky.app/profile/rebe...
rebeccarhelm.bsky.social Rebecca R Helm @rebeccarhelm.bsky.social · Nov 28
"CLEANING" THE OCEAN USING NETS IS A DANGEROUS IDEA.

The Ocean Cleanup is using boats & a net to collect ocean plastic (left). I've circles all the animals trapped in their early prototypes (right).

There are better ways to solve the ocean plastic problem... 🧵
#INC5 #PlasticsTreaty #PlasticTreaty
Two boats with a net dragged between them A net showing captured plastic and marine life, which is circled in red
November 28, 2024 at 6:54 AM
pcauchy.bsky.social
Are you excited about marine soundscapes? Interested in contributing to tackling the ocean noise challenge and mitigating its effects on marine life? 🌊🧪🎙️🐋
I have nice opportunities coming your way, MSc and postdoc projects building on a 4+ years dataset collected in the St. Lawrence.
Stay tuned…
November 26, 2024 at 6:51 PM
pcauchy.bsky.social
Des drones sous-marins pour écouter l’océan !
Bourse pour un projet de recherche de 2 ans sur le bruit des tempêtes, des navires, et des baleines en Méditerranée, avec des gliders.
ismer.ca/images/offres/…
December 14, 2023 at 2:27 PM