hi idk if you were serious or not abt asking you abt evolution but i would love to learn more abt evolution if u want to talk abt it !! :]
I was being so serious!!! This has just taken me so long to answer because I couldnt figure out what part of evolution I wanted to talk about as if this is the only time id ever be able to talk about evolution on this blog askldjhfkalsjhdf
I've been thinking a lot lately about the grandmother hypothesis, which is the hypothesis for why female primate life expectancy is longer than the period in which the female is reproductively active for. (also wait i cant remember if this hypothesis applies to other animals as well or if it only applies to primates? ive really only studied both human and non-human primates so im a little bit clueless when it comes to evolution of other animals)
Like ok so hold on let me back up
So any biological organism has a life goal, and that is to reproduce as much as possible to make as many offspring as possible to ensure that your genes are being passed on to next generations. So when talking about evolution, an organism basically wants to have the best genes that allow it to survive long enough to reproduce, as well as reproduce as much as possible, and to ensure that their offspring reach reproductive age.
Now there are many different strategies to reach these goals, but for female animals that have low reproductive frequencies they have to expend a lot of energy in order to ensure that their offspring reach reproductive age. And when i say low reproductive frequency i mean like ok take humans for example, like you have a single baby and that takes nine full months, in that time the mother has to expend a lot of energy in order to grow the fetus, and then once the baby has been born, the mother then has to expend 18 years of energy raising the child till its an adult. Of course in humans this is different because like we dont live just to reproduce but thats what i mean with like female animals having to use up a lot of energy in order to pass on their own genes.
So basically, if a female animal's life goal is to reproduce as much as possible then why would they continue to live once they are no longer fertile? Basically the grandmother hypothesis is that females live longer than they are fertile for in order to help their own daughters raise their young.
It's super common at least in primates AGAIN CANNOT EMPHASIZE HOW MUCH ALL MY INFORMATION IS PRIMATOCENTRIC I HAVE A BACKGROUND IN ANTHROPOLOGY AND PRIMATOLOGY NOT ANY OTHER SORT OF BIOLOGY but its super common for first time primate mothers to lose their first few infants, and by lose i mean the infants will die because the mother is inexperienced. And that loss of life is like SUPER costly to the mother because she just spent x amount of time growing that baby and during that time she missed out on being able to reproduce so now not only is she back to square one but she essentially just wasted all that energy. BUT that mother that just lost an infant? well she has a mother, and that mother who is now a grandmother has tones of experience raising infants and is less likely to have an infant die on her. So the grandmother hypothesis is basically that females live past reproductive age in order to help their own daughters raise infants, which helps the grandmother ensure her own genes are being carried on for more generations by making sure her daughter is reproductively successful.
there are a lot of other really neat examples of like this sort of mothering? where like females with infants rely on the help of other females to raise their children. i just think its neat :)