@@charliedoyle7824 thank you for the bringing that to my attention. I'll take a look and see if I can make it a better resolution. I thought Part 1 looked a little off. Wasn't sure if that was just me.
Aside from recording this video all over again, which I will but not from a while, just fix the setting on the video setting under the video screen. Only the first video is Standard Definition all the rest appear to be High Definition.
Good presentation. It may have happened that asteroid strikes melted regions of the primitive mafic crust and forced early local differentiation, creating the very first granitoid proto-cratons :) New data suggests that the Theia-earth mk 1 collision was head on, creating a synestia, with the Moon forming inside an atmosphere of vapourized rock :) Earth mk 1 *may* have had primitive life, some of which survived inside fragments, some of which orbited back to earth mk 2 after the crust and oceans reformed :) The Moon after it 1st formed was 1/10 its current distance, and tidal forces gradually pushed it out further and further, Earth mk 2's initial day length was very short, around 6 hours, which gradually lengthened over time :) The very 1st photosynthesis used retinal and absorbed green light, making the bacteria doing this look purple. oxygen for this type of photosynthesis was not produced...it was a sulphate plus water plus CO2 yielding sulphur dioxide. Green oxygen photosynthesis took over later and peaked 2.4 billion years ago in the Oxygen Catastrophe, Earth mk 2's *biggest* extinction even, killing 99% of ALL anaerobic microbial life. The Oxygen catastrophe was quickly followed by the Huronian Glaciation, earth mk2's very 1st. There were also the Cryogenian glaciations which were long and gave us "snowball earth" around 720-635 million years ago, which alternated from a global average temperature of -50 C to one of +50 C.
@@eoachan9304 I'm actually going to address Snowball Earth in Part 4 coming up. I was hoping to record it this week but work keeps getting me home way top late and I'm out of gas. Look for Part 4 sometime early next week. I also do plan on doing a whole lecture on Snowbsll Earth one I've completed this series.
Actually, the *largest* known mass extinction was 2.4 billion years ago during the Great Oxygenation Event , 99% of all microbial life(the only life then) died off.
@@eoachan9304 agreed. That's a tough one to document due to the lack of fossils. GOE absolutely rocked the world since most lifeforms were converting CO2 to O2. I like the feedback.
I like the idea of counting each microbe, to reach a number of creatures driven to extinction, in order to reach some sort of comparison for extinctions (which I know is NOT what you are doing). Actually I have never given any thought before to how the other "great" extinction events affected that level of life, the microscopic. Though I'm pretty sure I recall hearing someone discussing studying the types of minute sea organisms as a method of measuring/understanding/estimating increased death rates during some extinction event or lethal change in ocean event. So clearly people who know what they are doing, have done that. I'm very much a dim and not educated upon the subject type watcher of geology and deep time history videos. Anything I say would make cringe the people who actually know things. I know it's said that a little education can be worse than none. I might be a perfect example of that.
