3 ms·
The first symbiotic event was a million times harder than the 2nd or the 3rd. The first time the host had the extremely hard task of dealing with any DNA and RN
by borisk 2y ago
The first symbiotic event was a million times harder than the 2nd or the 3rd. The first time the host had the extremely hard task of dealing with any DNA and RNA produced by the guest during it's life and death. The host had to evolve stuff like a cell nucleaus and sex to live through it and alternative splicing to deal with the fact that all it's genes were damaged by selfish genetic elements that came from the guest. Integrating any later symbionts is still hard, but not nearly as hard.
It's possible that the first symbiosis that let to the origin of the eukaryotes is not a one in a billion years event, but one in a trillion or one in 10^20 years or ever rarer. That is it may be that in a billion planets with simple life forms only one "creates" complex life like animals. It can be the great filter that leads to the Fermi paradox.
- ryanjamurphy 2y ago> It can be the great filter that leads to the Fermi paradox. I'm increasingly of a similar view — that the great filter is something we're already past, due to the incredible combinations of constraints that led to where we are today. Another infinitesimal probability may be the development of abstract intelligence. The conditions that led to our brand of intelligence being an evolutionary advantage seem particularly unique: https://www.ncbi.nlm.nih.gov/books/NBK210002/ https://www.ncbi.nlm.nih.gov/books/NBK210002/
- borissk 2y agoGood one, I'll have a look. Are there any good videos on YouTube on the topic of origin of intelligence? I can't seem to find any.
- ryanjamurphy 2y agoWish I could recommend one but I don't frequent YouTube, sorry!
- AmIDev 2y agoI feel there might be intelligent species out there without either the resources to develop technology or the ability to do so. Sharks could become smarter than us one day, but without thumbs they aren't going to succeed in overtaking the planet. Similarly, there could be a humanoid fish species under thick ice sheets of Europa, and they would never guess there is anything more than their "ocean" in the universe.
- myroon5 2y agoOrcas have impressive brains: https://en.wikipedia.org/wiki/List_of_animals_by_number_of_neurons#List_of_animal_species_by_forebrain_(cerebrum_or_pallium)_neuron_number https://en.wikipedia.org/wiki/List_of_animals_by_number_of_n...