Answer:
Wait like actually? Do we need to get to Mars?
 
        
                    
             
        
        
        
Answer: Aristotle and Ptolemy had both assumed each planet is attached to a single sphere, but geometers and astronomers could employ a number of such spheres to generate the observed motions of the planets.
Explanation:
 
        
             
        
        
        
Hello there! 
'Parental generation' is the term which he used. Hope I helped. 
        
             
        
        
        
It's important because we need the scientists to discover where it is. the lokiarchaeota is a main cause for infections, and diseases, and if we identify it, and study it, we may know how to cure certain diseases, and how to prevent them.