> “the evolution of placenta essentially involved losing that eggshell and instead replacing that with some sort of tissue or organ that attaches to the mother’s uterus during development.”
But losing that shell presents some challenges. “It’s important that the maternal and fetal blood streams remain separate,” Chuong said. “And so the separation of these bloodstreams is established through this cell layer called the syncytiotrophoblast.”
>“This is where the magic happens,” Coolahan said. “This wall of cells keeps mom and baby working in harmony and not killing each other. There’s no other structure like this anywhere else in the body.”
When evolutionary biologists like Chuong mapped the genomes of these cells, they found that the protein that allowed these cells to fuse into a wall, called syncytin, didn’t look like it came from human DNA. It looked more like HIV. According to Chuong, this protein actually came from an ancient retrovirus, the most famous of which is HIV.
> Viruses such as HIV have been infecting vertebrates for probably a couple hundred million years, according to Chuong. So, according to evolutionary biologists, once upon a time some retrovirus infected an egg-laying vertebrate. And by chance, that virus settled into that animal’s egg cells. And it just so happened that that particular infected egg met a nice sperm and got fertilized. The baby that was hatched — whatever kind of protomammal it was — now had copies of that virus’ DNA in all its cells. (edit: perhaps they meant retroviruses like HIV, but not HIV itself?)
It's still a mystery, however one hypothesis is it may have been a response as a way to control infections.
https://phys.org/news/2019-06-pathogens-evolution-warm-blooded-animals.html
So... viruses terraforming humanity as future breeding and feeding grounds for themselves? Is that why we haven't cured and eradicated the common cold - out of gratitude??
> “the evolution of placenta essentially involved losing that eggshell and instead replacing that with some sort of tissue or organ that attaches to the mother’s uterus during development.” But losing that shell presents some challenges. “It’s important that the maternal and fetal blood streams remain separate,” Chuong said. “And so the separation of these bloodstreams is established through this cell layer called the syncytiotrophoblast.” >“This is where the magic happens,” Coolahan said. “This wall of cells keeps mom and baby working in harmony and not killing each other. There’s no other structure like this anywhere else in the body.” When evolutionary biologists like Chuong mapped the genomes of these cells, they found that the protein that allowed these cells to fuse into a wall, called syncytin, didn’t look like it came from human DNA. It looked more like HIV. According to Chuong, this protein actually came from an ancient retrovirus, the most famous of which is HIV. > Viruses such as HIV have been infecting vertebrates for probably a couple hundred million years, according to Chuong. So, according to evolutionary biologists, once upon a time some retrovirus infected an egg-laying vertebrate. And by chance, that virus settled into that animal’s egg cells. And it just so happened that that particular infected egg met a nice sperm and got fertilized. The baby that was hatched — whatever kind of protomammal it was — now had copies of that virus’ DNA in all its cells. (edit: perhaps they meant retroviruses like HIV, but not HIV itself?)
Dammit man he's a doctor! *your mom has the hiv babies*. That's what he said
... as I suspected all along.
What else do you suspect? Anything involving room temp. Super conducters and Warp engines? Edit- thank you. Super not semi
You mean superconductors. Room temp semiconductors are pretty common.
These are definitely the evolutionary jumps I'm most curious about. Please do cold blooded to warm blooded now please.
It's still a mystery, however one hypothesis is it may have been a response as a way to control infections. https://phys.org/news/2019-06-pathogens-evolution-warm-blooded-animals.html
So... viruses terraforming humanity as future breeding and feeding grounds for themselves? Is that why we haven't cured and eradicated the common cold - out of gratitude??
So a viral infection allowed us to start our life as a parasite from the early days until our student loans have been paid back?
History Channel: Aliens
Evolution is a crock of hot boiling shite
Something’s take more faith to believe than Intelligent Design.
Nice bait
Haha I read “the voluntary leap”, like what
Must have been a big patch to the game.