That's terrifying.
https://en.wikipedia.org/wiki/Parabiosis#Parabiotic_experime...
Also did some other fun things such as mass killings of rats using mini-guillotines, harvesting bones and doing amateur brain surgeries while other rats watched restlessly and anxiously peeped from the smell of blood.
This kind of stuff can mess with your sanity. For me it was a converse of how serial killers injure animals when they were children.
Still have nightmares sometimes.
http://blogs.discovermagazine.com/80beats/2011/11/21/helpful...
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2633676/
> Fetal cells migrate into the mother during pregnancy. Fetomaternal transfer probably
> occurs in all pregnancies and in humans the fetal cells can persist for decades.
> Microchimeric fetal cells are found in various maternal tissues and organs including
> blood, bone marrow, skin and liver. In mice, fetal cells have also been found in the
> brain. The fetal cells also appear to target sites of injury. Fetomaternal
> microchimerism may have important implications for the immune status of women,
> influencing autoimmunity and tolerance to transplants.Immortal of course doesn't mean impervious. A long, unaged, productive life span would still require food, water, shelter, and some amount of safety.
One of the most common (and usually loudest) arguments I hear against general species-wide immortality is the resource limitations of Earth. Well, if we can live for a thousand years or ten thousand years, what's the purpose of not traveling interstellar distances? The major limits are mostly the lifespan and related issues after all. The rest is mostly engineering. We're good at engineering our surroundings.
> The researchers think that many benefits seen in old mice after receiving young blood might be due to the young blood diluting the concentration of inhibitors in the old blood.
How can these things be compatible? If it were diluting the inhibitors, that should have shown up as an improvement in the old mice, no?
Imagine that the effective (deleterious) dose of these inhibitors is, say, 10% of the amount found in old mice. So an equal exchange between two mice is enough to provide an effective dose to the young mouse, but not enough to eliminate an effective dose to the old mouse.
keyword is 'slight' improvements. it's a poorly written sentence.
Yes, there study did show that young blood can not stop the effects of old blood.
However if someone were going to get transfused with young blood the amount of old blood in their system would decrease, so then, presumably, you would see anti-aging effects.
I don't know why they didn't present the research like that. It seems like they don't want to say it or I'm just missing some logical step in my thinking.
My personal theory is older organisms get colonized by all kinds of bacteria that might trigger or speed up the breakdown the body.