Their lineage diverged long ago from a common ancestor...
The ability to use oxygen for respiration allowed the diversity of life to expand vastly.
Early hemoglobins most likely evolved to bind and detoxify these gases...
... Hood said, and hemoglobins evolved into oxygen carriers rather than detoxifiers...
... “LUCA is believed to have been a metabolically ‘flexible’ single-celled organism with the ability to utilize oxygen for energy before free oxygen even existed in the air,...
Amazing amount of certainty in these statements. You have to admire someone with that much faith. I guess we are all just to smile and nod when such doctrines are stated.
I wonder if Evol-Doers have monasteries where the faithful can live simple lives and ponder the wonders of their faith to achieve this level of metaphysical certitude.
Instead of saying 'Thus saith the Lord', they just use an 'everybody knows Evolution happened, it is an insult to our intelligence to ask for details to back up our assumptions!' Pay no attention to the man behind the curtain.
It's a real leap of faith to believe that in such a large universe (of which only 2.5% is ever going to be accessible, sensible or visible to us) that life wasn't developed/designed elsewhere, probably several times. No doubt it will even outlast the heat-death of the present physical universe in which we find ourselves ~ it's that well designed!
I agree. It's very annoying when people use imprecise language. It's like saying 'everybody knows' the earth is round, but did they run it by these people??
And, if the article had used the words "might" or "maybe" you'd be lambasting the researchers for making up "just-so" stories.