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“Vu”, le zapping de France Télévisions, débranché le 30 juin
Le programme court quotidien de France 5 prendra fin le 30 juin par mesure d’économie. L’ex-“Zapping” avait prospéré sur Canal+ pendant vingt-sept ans, avant d’être supprimé par Vincent Bolloré et rap...
![[a screenshot of a text message conversation.]
Sender:
"Do you know why sharks live in salt water"
Recipient:
"I mean it's all about osmotic balance. Saltwater fish are usually about isosmotic with saltwater and don't have to regulate their water input and output as much. There are some purely freshwater sharks are rays, though, including Amazonian stingrays, the entirely freshwater shark species in SE Asia and australia, giant river rays, and of course the part-time freshwater habits of bull sharks"
"It's pretty taxing evolutionarily to disrupt that, it has a lot to do with kidney function and water intake. In generally, freshwater fish don't drink water bc they have to retain their ions and such"
"And usually, the ecological niches that sharks would occupy in freshwater are either already taken, or the freshwater system isn't big enough or too inaccessible to support it."
"The Amazon basin, rivers in SE Asia, African Great lakes, and American great lakes are basically the places that are big enough to support it. Of those, the Amazon is taken by catfish and arapaima, SE Asian rivers already do have freshwater sharks, and the two great lakes systems are largely inaccessible from the ocean so it's harder for sharks to get in and speciate"
"Why do you ask?"
Sender:
"Because pepper water would make them sneeze"](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:4djfp3b27soxcfkxhirydi6d/bafkreiaxbb7vmqf7e642utkgyo4tax6vk2yvswhjydk4ftc22k3mjkti6y)
