4.6 billion years ago the earth formed
        
                    
             
        
        
        
If multiple researches obtained the same result, it means that the test is highly repeatable ! Highly repeatable results are always very welcomes, because people believe that they have a high validity and high credibility. 
So the correct answer is:
<span>a) Discoveries are more credible when they are independently verified</span>
        
                    
             
        
        
        
Listing the similarities between Parasympathetic and Sympathetic Nervous Systems
Both are part of the Autonomic Nervous System of our body.
Both Sympathetic and Parasympathetic nerves are involved in involuntary functions of the body.
Both Sympathetic and Parasympathetic Divisions of the Autonomic Nervous System impact the physiological processes of the body. 
<h2><u><em>
brainlist please</em></u></h2>
 
        
             
        
        
        
Sight is the answer a newborn can barley see