"Theories change since they are just that - theories . Once time and sufficient investigation has given them sufficient weight , they become laws . Newton 's laws were derived to explain direct human experiences ( we deal with relatively large objects going at slow speeds relative to the speed of light ) and for that regime , they remain true . Since there were still a multitude of basic unanswered questions at the time in Science ( about light , the nature of matter , etc . ) , investigation continued and found , in the 20th century , the laws of relativity and quantum mechanics to explain occurrences outside of the range of the large and slow that we experience . At the beginning of science ( say ~17th century ) , there were a lot more questions than answers . Now , itÂ ’ s the other way around - at least when it comes to the essential theoretical basis behind things that human 's experience ."
"Really ? A lot of people say that every answer makes more questions . In some ways we seem to know less now than we did at the time of Newton , in that we are less certain . And Newton 's laws deal with what happens in a vacuum with no resistance , not direct human experience At any rate , my point is that you ca n't see all the evidence as piling up support for 'science ' as 'science ' is moulded to fit that evidence . Not a criticism of science , btw ."
"Theories change since they are just that - theories . Once time and sufficient investigation has given them sufficient weight , they become laws ."
"Really ? A lot of people say that every answer makes more questions . In some ways we seem to know less now than we did at the time of Newton , in that we are less certain ."