Changes

'''Natural causes''' are physical forces like [[gravity]], [[magnetism]], [[electric field]]s and so on which operate consistently. Sometimes they are called '''laws of nature''', because careful observers over the years have not found any exceptions to these forces.  

'''Natural causes''' are physical forces like [[gravity]], [[magnetism]], [[electric field]]s and so on which operate consistently. Sometimes they are called '''laws of nature''', because careful observers over the years have not found any exceptions to these forces.  

For example, whenever you drop something heavy, it falls. Or whenever you combine two chemicals of a certain type, they always react the same way.  

For example, whenever you drop something, it falls. Or whenever you combine two chemicals of a certain type, they always react the same way.  

In the biological world, there are natural laws governing [[plant growth]], [[animal behavior]], [[infectious disease]]s and so on.  

In the biological world, there are natural laws governing [[plant growth]], [[animal behavior]], [[infectious disease]]s and so on.