Couple science questions...

187eagle said:
No. The earths atmosphere used to have no signifigant concentration of O2 gas. Early organisms (talking 1 celled bacteria, ect) did not use O2 in their metabolisms. Then 1 type called cyanobacteria developed, and they used photosynthesis with O2 as a byproduct. Gradually over millions/billions of years the concentration of O2 in the atmosphere increased to a point where more complex metabolisms using O2 were used and therefore more complex organsims could develop.

So its not the fact O2 means more complex. It means it just happened that way?


And i'm not sure what I mean when I ask how fast is the sun moving. Perhaps you could give some examples?
 
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