3 ms·
>This shit could not have happened so fast (few tens or hundreds of million years?) It didn't happen that fast. The earliest direct evidence, (as in: fossils)
by usrbinbash 5y ago
>This shit could not have happened so fast (few tens or hundreds of million years?)
It didn't happen that fast.
The earliest direct evidence, (as in: fossils) for life on earth are 3.465 BILLION years old.
https://en.wikipedia.org/wiki/Earliest_known_life_forms https://en.wikipedia.org/wiki/Earliest_known_life_forms
>Also anyone who’s worked in a lab trying to keep some Lb plates sterile would immediately see how difficult it would be to keep an earth sized Lb plate sterile if the galaxy has a ton of life harboring planets.
The earths diameter is 12742 km.
A petri-dish is usually about 12 cm in diameter.
The closest star system (Alpha Centaury) is 9461000000000 km away (4.35 LY).
So the closest place in the galaxy where there is even sufficient mass for conditions to form life, is ~2970020405 earth-diameters from here.
Two petri dishes on opposite sides of the planet are ~106183333 petri-dish-diameters away from each other.
So purely from a perspective of distance, the chance that two petri-dishes on opposite sides of the planet transmit life between them, is an order of magnitude HIGHER than life coming to earth from outer space.
- ramraj07 5y agoRead your own ref. Optimistic estimates put the first appearance of life on earth as soon as 50 mill years after oceans formed. The Petri dish analogy was only supposed to be tounge in cheek but if you want to be pedantic then consider that the medium between the source and destination is a frozen vacuum which means you have billions of years for transmission and spreading.
- usrbinbash 5y agoYes, and these oceans formed 4.5 billion years ago, aka. much longer than "few tens or hundreds of million years" > then consider that the medium between the source and destination is a frozen vacuum which means you have billions of years for transmission and spreading. And by what means does that spreading take place? Spreading implies a medium through which to spread, which doesn't exist in interstellar space. So that leaves moving over that distance on a fragment of a shattered planetoid for example. The fastest known asteroid, 2021-PH27 clocks at around 106 km/sec. Meaning, it would require about 2800y to make it's journey (remember, this is still alpha centauri I'm talking about, which by all accounts has no planets in the habitable zone). 2800 years at top speed thorugh the vacuum of space, unshielded from the denaturing effects of cosmic radiation. And at the end of that travel, if it isn't swallowed up by the gravitational forces of the sun or our 2 gas giants, an impact event comparable to a large thermonuclear device going off. Sorry, but compared to that, sponeneous abiogenesis sounds a lot more plausible to me.
- ramraj07 5y agoSeriously, Read the two sentences immediately after the sentence you got your number from in the Wikipedia page you referred. Earliest estimates go back further.
- usrbinbash 5y agoAnd where exactly am I talking about "estimates"? Quote from my post: "The earliest direct evidence," Direct evidence != Estimates.